diff --git a/nixos/maintainers/scripts/cloudstack/cloudstack-image.nix b/nixos/maintainers/scripts/cloudstack/cloudstack-image.nix
index 37b46db059c..005f75476e9 100644
--- a/nixos/maintainers/scripts/cloudstack/cloudstack-image.nix
+++ b/nixos/maintainers/scripts/cloudstack/cloudstack-image.nix
@@ -10,7 +10,6 @@ with lib;
 
   system.build.cloudstackImage = import ../../../lib/make-disk-image.nix {
     inherit lib config pkgs;
-    diskSize = 8192;
     format = "qcow2";
     configFile = pkgs.writeText "configuration.nix"
       ''
diff --git a/nixos/maintainers/scripts/ec2/amazon-image.nix b/nixos/maintainers/scripts/ec2/amazon-image.nix
index 0ecf07669a1..653744986d1 100644
--- a/nixos/maintainers/scripts/ec2/amazon-image.nix
+++ b/nixos/maintainers/scripts/ec2/amazon-image.nix
@@ -40,8 +40,9 @@ in {
     };
 
     sizeMB = mkOption {
-      type = types.int;
-      default = if config.ec2.hvm then 2048 else 8192;
+      type = with types; either (enum [ "auto" ]) int;
+      default = "auto";
+      example = 8192;
       description = "The size in MB of the image";
     };
 
diff --git a/nixos/maintainers/scripts/openstack/openstack-image.nix b/nixos/maintainers/scripts/openstack/openstack-image.nix
index 4c464f43f61..3255e7f3d44 100644
--- a/nixos/maintainers/scripts/openstack/openstack-image.nix
+++ b/nixos/maintainers/scripts/openstack/openstack-image.nix
@@ -12,8 +12,8 @@ with lib;
 
   system.build.openstackImage = import ../../../lib/make-disk-image.nix {
     inherit lib config;
+    additionalSpace = "1024M";
     pkgs = import ../../../.. { inherit (pkgs) system; }; # ensure we use the regular qemu-kvm package
-    diskSize = 8192;
     format = "qcow2";
     configFile = pkgs.writeText "configuration.nix"
       ''
diff --git a/nixos/modules/config/users-groups.nix b/nixos/modules/config/users-groups.nix
index 2b6a61e9a80..567a8b6f3b9 100644
--- a/nixos/modules/config/users-groups.nix
+++ b/nixos/modules/config/users-groups.nix
@@ -6,6 +6,12 @@ let
   ids = config.ids;
   cfg = config.users;
 
+  isPasswdCompatible = str: !(hasInfix ":" str || hasInfix "\n" str);
+  passwdEntry = type: lib.types.addCheck type isPasswdCompatible // {
+    name = "passwdEntry ${type.name}";
+    description = "${type.description}, not containing newlines or colons";
+  };
+
   # Check whether a password hash will allow login.
   allowsLogin = hash:
     hash == "" # login without password
@@ -54,7 +60,7 @@ let
     options = {
 
       name = mkOption {
-        type = types.str;
+        type = passwdEntry types.str;
         apply = x: assert (builtins.stringLength x < 32 || abort "Username '${x}' is longer than 31 characters which is not allowed!"); x;
         description = ''
           The name of the user account. If undefined, the name of the
@@ -63,7 +69,7 @@ let
       };
 
       description = mkOption {
-        type = types.str;
+        type = passwdEntry types.str;
         default = "";
         example = "Alice Q. User";
         description = ''
@@ -128,7 +134,7 @@ let
       };
 
       home = mkOption {
-        type = types.path;
+        type = passwdEntry types.path;
         default = "/var/empty";
         description = "The user's home directory.";
       };
@@ -157,7 +163,7 @@ let
       };
 
       shell = mkOption {
-        type = types.nullOr (types.either types.shellPackage types.path);
+        type = types.nullOr (types.either types.shellPackage (passwdEntry types.path));
         default = pkgs.shadow;
         defaultText = "pkgs.shadow";
         example = literalExample "pkgs.bashInteractive";
@@ -217,7 +223,7 @@ let
       };
 
       hashedPassword = mkOption {
-        type = with types; nullOr str;
+        type = with types; nullOr (passwdEntry str);
         default = null;
         description = ''
           Specifies the hashed password for the user.
@@ -251,7 +257,7 @@ let
       };
 
       initialHashedPassword = mkOption {
-        type = with types; nullOr str;
+        type = with types; nullOr (passwdEntry str);
         default = null;
         description = ''
           Specifies the initial hashed password for the user, i.e. the
@@ -323,7 +329,7 @@ let
     options = {
 
       name = mkOption {
-        type = types.str;
+        type = passwdEntry types.str;
         description = ''
           The name of the group. If undefined, the name of the attribute set
           will be used.
@@ -340,7 +346,7 @@ let
       };
 
       members = mkOption {
-        type = with types; listOf str;
+        type = with types; listOf (passwdEntry str);
         default = [];
         description = ''
           The user names of the group members, added to the
diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index ecd3a3c1a16..0cd0659d1da 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -770,7 +770,6 @@
   ./services/networking/prayer.nix
   ./services/networking/privoxy.nix
   ./services/networking/prosody.nix
-  ./services/networking/quagga.nix
   ./services/networking/quassel.nix
   ./services/networking/quorum.nix
   ./services/networking/quicktun.nix
diff --git a/nixos/modules/rename.nix b/nixos/modules/rename.nix
index 9f1efc46279..233e3ee848b 100644
--- a/nixos/modules/rename.nix
+++ b/nixos/modules/rename.nix
@@ -18,6 +18,7 @@ with lib;
 
     # Completely removed modules
     (mkRemovedOptionModule [ "fonts" "fontconfig" "penultimate" ] "The corresponding package has removed from nixpkgs.")
+    (mkRemovedOptionModule [ "services" "quagga" ] "the corresponding package has been removed from nixpkgs")
     (mkRemovedOptionModule [ "services" "chronos" ] "The corresponding package was removed from nixpkgs.")
     (mkRemovedOptionModule [ "services" "deepin" ] "The corresponding packages were removed from nixpkgs.")
     (mkRemovedOptionModule [ "services" "firefox" "syncserver" "user" ] "")
diff --git a/nixos/modules/services/networking/quagga.nix b/nixos/modules/services/networking/quagga.nix
deleted file mode 100644
index 001a5c2b0ce..00000000000
--- a/nixos/modules/services/networking/quagga.nix
+++ /dev/null
@@ -1,185 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-with lib;
-
-let
-
-  cfg = config.services.quagga;
-
-  services = [ "babel" "bgp" "isis" "ospf6" "ospf" "pim" "rip" "ripng" ];
-  allServices = services ++ [ "zebra" ];
-
-  isEnabled = service: cfg.${service}.enable;
-
-  daemonName = service: if service == "zebra" then service else "${service}d";
-
-  configFile = service:
-    let
-      scfg = cfg.${service};
-    in
-      if scfg.configFile != null then scfg.configFile
-      else pkgs.writeText "${daemonName service}.conf"
-        ''
-          ! Quagga ${daemonName service} configuration
-          !
-          hostname ${config.networking.hostName}
-          log syslog
-          service password-encryption
-          !
-          ${scfg.config}
-          !
-          end
-        '';
-
-  serviceOptions = service:
-    {
-      enable = mkEnableOption "the Quagga ${toUpper service} routing protocol";
-
-      configFile = mkOption {
-        type = types.nullOr types.path;
-        default = null;
-        example = "/etc/quagga/${daemonName service}.conf";
-        description = ''
-          Configuration file to use for Quagga ${daemonName service}.
-          By default the NixOS generated files are used.
-        '';
-      };
-
-      config = mkOption {
-        type = types.lines;
-        default = "";
-        example =
-          let
-            examples = {
-              rip = ''
-                router rip
-                  network 10.0.0.0/8
-              '';
-
-              ospf = ''
-                router ospf
-                  network 10.0.0.0/8 area 0
-              '';
-
-              bgp = ''
-                router bgp 65001
-                  neighbor 10.0.0.1 remote-as 65001
-              '';
-            };
-          in
-            examples.${service} or "";
-        description = ''
-          ${daemonName service} configuration statements.
-        '';
-      };
-
-      vtyListenAddress = mkOption {
-        type = types.str;
-        default = "127.0.0.1";
-        description = ''
-          Address to bind to for the VTY interface.
-        '';
-      };
-
-      vtyListenPort = mkOption {
-        type = types.nullOr types.int;
-        default = null;
-        description = ''
-          TCP Port to bind to for the VTY interface.
-        '';
-      };
-    };
-
-in
-
-{
-
-  ###### interface
-  imports = [
-    {
-      options.services.quagga = {
-        zebra = (serviceOptions "zebra") // {
-          enable = mkOption {
-            type = types.bool;
-            default = any isEnabled services;
-            description = ''
-              Whether to enable the Zebra routing manager.
-
-              The Zebra routing manager is automatically enabled
-              if any routing protocols are configured.
-            '';
-          };
-        };
-      };
-    }
-    { options.services.quagga = (genAttrs services serviceOptions); }
-  ];
-
-  ###### implementation
-
-  config = mkIf (any isEnabled allServices) {
-
-    environment.systemPackages = [
-      pkgs.quagga               # for the vtysh tool
-    ];
-
-    users.users.quagga = {
-      description = "Quagga daemon user";
-      isSystemUser = true;
-      group = "quagga";
-    };
-
-    users.groups = {
-      quagga = {};
-      # Members of the quaggavty group can use vtysh to inspect the Quagga daemons
-      quaggavty = { members = [ "quagga" ]; };
-    };
-
-    systemd.services =
-      let
-        quaggaService = service:
-          let
-            scfg = cfg.${service};
-            daemon = daemonName service;
-          in
-            nameValuePair daemon ({
-              wantedBy = [ "multi-user.target" ];
-              restartTriggers = [ (configFile service) ];
-
-              serviceConfig = {
-                Type = "forking";
-                PIDFile = "/run/quagga/${daemon}.pid";
-                ExecStart = "@${pkgs.quagga}/libexec/quagga/${daemon} ${daemon} -d -f ${configFile service}"
-                  + optionalString (scfg.vtyListenAddress != "") " -A ${scfg.vtyListenAddress}"
-                  + optionalString (scfg.vtyListenPort != null) " -P ${toString scfg.vtyListenPort}";
-                ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
-                Restart = "on-abort";
-              };
-            } // (
-              if service == "zebra" then
-                {
-                  description = "Quagga Zebra routing manager";
-                  unitConfig.Documentation = "man:zebra(8)";
-                  after = [ "network.target" ];
-                  preStart = ''
-                    install -m 0755 -o quagga -g quagga -d /run/quagga
-
-                    ${pkgs.iproute2}/bin/ip route flush proto zebra
-                  '';
-                }
-              else
-                {
-                  description = "Quagga ${toUpper service} routing daemon";
-                  unitConfig.Documentation = "man:${daemon}(8) man:zebra(8)";
-                  bindsTo = [ "zebra.service" ];
-                  after = [ "network.target" "zebra.service" ];
-                }
-            ));
-       in
-         listToAttrs (map quaggaService (filter isEnabled allServices));
-
-  };
-
-  meta.maintainers = with lib.maintainers; [ ];
-
-}
diff --git a/nixos/modules/virtualisation/azure-image.nix b/nixos/modules/virtualisation/azure-image.nix
index 60fed3222ef..03dd3c05130 100644
--- a/nixos/modules/virtualisation/azure-image.nix
+++ b/nixos/modules/virtualisation/azure-image.nix
@@ -9,8 +9,9 @@ in
 
   options = {
     virtualisation.azureImage.diskSize = mkOption {
-      type = with types; int;
-      default = 2048;
+      type = with types; either (enum [ "auto" ]) int;
+      default = "auto";
+      example = 2048;
       description = ''
         Size of disk image. Unit is MB.
       '';
diff --git a/nixos/modules/virtualisation/digital-ocean-image.nix b/nixos/modules/virtualisation/digital-ocean-image.nix
index b582e235d43..0ff2ee591f2 100644
--- a/nixos/modules/virtualisation/digital-ocean-image.nix
+++ b/nixos/modules/virtualisation/digital-ocean-image.nix
@@ -10,8 +10,9 @@ in
 
   options = {
     virtualisation.digitalOceanImage.diskSize = mkOption {
-      type = with types; int;
-      default = 4096;
+      type = with types; either (enum [ "auto" ]) int;
+      default = "auto";
+      example = 4096;
       description = ''
         Size of disk image. Unit is MB.
       '';
diff --git a/nixos/modules/virtualisation/google-compute-image.nix b/nixos/modules/virtualisation/google-compute-image.nix
index e2332df611a..79c3921669e 100644
--- a/nixos/modules/virtualisation/google-compute-image.nix
+++ b/nixos/modules/virtualisation/google-compute-image.nix
@@ -18,8 +18,9 @@ in
 
   options = {
     virtualisation.googleComputeImage.diskSize = mkOption {
-      type = with types; int;
-      default = 1536;
+      type = with types; either (enum [ "auto" ]) int;
+      default = "auto";
+      example = 1536;
       description = ''
         Size of disk image. Unit is MB.
       '';
diff --git a/nixos/modules/virtualisation/hyperv-image.nix b/nixos/modules/virtualisation/hyperv-image.nix
index fabc9113dfc..6845d675009 100644
--- a/nixos/modules/virtualisation/hyperv-image.nix
+++ b/nixos/modules/virtualisation/hyperv-image.nix
@@ -9,8 +9,9 @@ in {
   options = {
     hyperv = {
       baseImageSize = mkOption {
-        type = types.int;
-        default = 2048;
+        type = with types; either (enum [ "auto" ]) int;
+        default = "auto";
+        example = 2048;
         description = ''
           The size of the hyper-v base image in MiB.
         '';
diff --git a/nixos/modules/virtualisation/virtualbox-image.nix b/nixos/modules/virtualisation/virtualbox-image.nix
index fa580e8b42d..071edda8269 100644
--- a/nixos/modules/virtualisation/virtualbox-image.nix
+++ b/nixos/modules/virtualisation/virtualbox-image.nix
@@ -11,8 +11,9 @@ in {
   options = {
     virtualbox = {
       baseImageSize = mkOption {
-        type = types.int;
-        default = 50 * 1024;
+        type = with types; either (enum [ "auto" ]) int;
+        default = "auto";
+        example = 50 * 1024;
         description = ''
           The size of the VirtualBox base image in MiB.
         '';
diff --git a/nixos/modules/virtualisation/vmware-image.nix b/nixos/modules/virtualisation/vmware-image.nix
index 9da9e145f7a..f6cd12e2bb7 100644
--- a/nixos/modules/virtualisation/vmware-image.nix
+++ b/nixos/modules/virtualisation/vmware-image.nix
@@ -18,8 +18,9 @@ in {
   options = {
     vmware = {
       baseImageSize = mkOption {
-        type = types.int;
-        default = 2048;
+        type = with types; either (enum [ "auto" ]) int;
+        default = "auto";
+        example = 2048;
         description = ''
           The size of the VMWare base image in MiB.
         '';
diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index 6656d287a42..1ce55e1eac4 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -343,7 +343,6 @@ in
   proxy = handleTest ./proxy.nix {};
   pt2-clone = handleTest ./pt2-clone.nix {};
   qboot = handleTestOn ["x86_64-linux" "i686-linux"] ./qboot.nix {};
-  quagga = handleTest ./quagga.nix {};
   quorum = handleTest ./quorum.nix {};
   rabbitmq = handleTest ./rabbitmq.nix {};
   radarr = handleTest ./radarr.nix {};
diff --git a/nixos/tests/quagga.nix b/nixos/tests/quagga.nix
deleted file mode 100644
index 1067f9eebb2..00000000000
--- a/nixos/tests/quagga.nix
+++ /dev/null
@@ -1,96 +0,0 @@
-# This test runs Quagga and checks if OSPF routing works.
-#
-# Network topology:
-#   [ client ]--net1--[ router1 ]--net2--[ router2 ]--net3--[ server ]
-#
-# All interfaces are in OSPF Area 0.
-
-import ./make-test-python.nix ({ pkgs, ... }:
-  let
-
-    ifAddr = node: iface: (pkgs.lib.head node.config.networking.interfaces.${iface}.ipv4.addresses).address;
-
-    ospfConf = ''
-      interface eth2
-        ip ospf hello-interval 1
-        ip ospf dead-interval 5
-      !
-      router ospf
-        network 192.168.0.0/16 area 0
-    '';
-
-  in
-    {
-      name = "quagga";
-
-      meta = with pkgs.lib.maintainers; {
-        maintainers = [ ];
-      };
-
-      nodes = {
-
-        client =
-          { nodes, ... }:
-          {
-            virtualisation.vlans = [ 1 ];
-            networking.defaultGateway = ifAddr nodes.router1 "eth1";
-          };
-
-        router1 =
-          { ... }:
-          {
-            virtualisation.vlans = [ 1 2 ];
-            boot.kernel.sysctl."net.ipv4.ip_forward" = "1";
-            networking.firewall.extraCommands = "iptables -A nixos-fw -i eth2 -p ospf -j ACCEPT";
-            services.quagga.ospf = {
-              enable = true;
-              config = ospfConf;
-            };
-          };
-
-        router2 =
-          { ... }:
-          {
-            virtualisation.vlans = [ 3 2 ];
-            boot.kernel.sysctl."net.ipv4.ip_forward" = "1";
-            networking.firewall.extraCommands = "iptables -A nixos-fw -i eth2 -p ospf -j ACCEPT";
-            services.quagga.ospf = {
-              enable = true;
-              config = ospfConf;
-            };
-          };
-
-        server =
-          { nodes, ... }:
-          {
-            virtualisation.vlans = [ 3 ];
-            networking.defaultGateway = ifAddr nodes.router2 "eth1";
-            networking.firewall.allowedTCPPorts = [ 80 ];
-            services.httpd.enable = true;
-            services.httpd.adminAddr = "foo@example.com";
-          };
-      };
-
-      testScript =
-        { ... }:
-        ''
-          start_all()
-
-          # Wait for the networking to start on all machines
-          for machine in client, router1, router2, server:
-              machine.wait_for_unit("network.target")
-
-          with subtest("Wait for OSPF to form adjacencies"):
-              for gw in router1, router2:
-                  gw.wait_for_unit("ospfd")
-                  gw.wait_until_succeeds("vtysh -c 'show ip ospf neighbor' | grep Full")
-                  gw.wait_until_succeeds("vtysh -c 'show ip route' | grep '^O>'")
-
-          with subtest("Test ICMP"):
-              client.wait_until_succeeds("ping -c 3 server >&2")
-
-          with subtest("Test whether HTTP works"):
-              server.wait_for_unit("httpd")
-              client.succeed("curl --fail http://server/ >&2")
-        '';
-    })
diff --git a/pkgs/development/compilers/gcc/8/default.nix b/pkgs/development/compilers/gcc/8/default.nix
index 4e57e43437f..e90e6e69de3 100644
--- a/pkgs/development/compilers/gcc/8/default.nix
+++ b/pkgs/development/compilers/gcc/8/default.nix
@@ -55,6 +55,7 @@ let majorVersion = "8";
 
     patches =
          optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
+      ++ optional targetPlatform.isNetBSD ../libstdc++-netbsd-ctypes.patch
       ++ optional noSysDirs ../no-sys-dirs.patch
       /* ++ optional (hostPlatform != buildPlatform) (fetchpatch { # XXX: Refine when this should be applied
         url = "https://git.busybox.net/buildroot/plain/package/gcc/${version}/0900-remove-selftests.patch?id=11271540bfe6adafbc133caf6b5b902a816f5f02";
diff --git a/pkgs/development/compilers/gcc/9/default.nix b/pkgs/development/compilers/gcc/9/default.nix
index 92810ecffaf..188da39e23c 100644
--- a/pkgs/development/compilers/gcc/9/default.nix
+++ b/pkgs/development/compilers/gcc/9/default.nix
@@ -70,6 +70,7 @@ let majorVersion = "9";
       # This patch can most likely be removed by a post 9.3.0-release.
       [ ./avoid-cycling-subreg-reloads.patch ]
       ++ optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
+      ++ optional targetPlatform.isNetBSD ../libstdc++-netbsd-ctypes.patch
       ++ optional noSysDirs ../no-sys-dirs.patch
       /* ++ optional (hostPlatform != buildPlatform) (fetchpatch { # XXX: Refine when this should be applied
         url = "https://git.busybox.net/buildroot/plain/package/gcc/${version}/0900-remove-selftests.patch?id=11271540bfe6adafbc133caf6b5b902a816f5f02";
diff --git a/pkgs/development/libraries/libxc/default.nix b/pkgs/development/libraries/libxc/default.nix
index f78cd09c0ae..d4f6391fe6f 100644
--- a/pkgs/development/libraries/libxc/default.nix
+++ b/pkgs/development/libraries/libxc/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchFromGitLab, cmake, gfortran, perl }:
 
 let
-  version = "5.1.2";
+  version = "5.1.3";
 
 in stdenv.mkDerivation {
   pname = "libxc";
@@ -11,7 +11,7 @@ in stdenv.mkDerivation {
     owner = "libxc";
     repo = "libxc";
     rev = version;
-    sha256 = "1bcj7x0kaal62m41v9hxb4h1d2cxs2ynvsfqqg7c5yi7829nvapb";
+    sha256 = "14czspifznsmvvix5hcm1rk18iy590qk8p5m00p0y032gmn9i2zj";
   };
 
   buildInputs = [ gfortran ];
@@ -28,7 +28,6 @@ in stdenv.mkDerivation {
   '';
 
   doCheck = true;
-  enableParallelBuilding = true;
 
   meta = with lib; {
     description = "Library of exchange-correlation functionals for density-functional theory";
diff --git a/pkgs/development/python-modules/azure-mgmt-synapse/default.nix b/pkgs/development/python-modules/azure-mgmt-synapse/default.nix
index fe3a99e62dc..1b26495e9b7 100644
--- a/pkgs/development/python-modules/azure-mgmt-synapse/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-synapse/default.nix
@@ -1,5 +1,6 @@
 { lib, buildPythonPackage, fetchPypi, pythonOlder
 , azure-common
+, azure-mgmt-core
 , msrest
 , msrestazure
 }:
@@ -17,6 +18,7 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [
     azure-common
+    azure-mgmt-core
     msrest
     msrestazure
   ];
diff --git a/pkgs/development/python-modules/b2sdk/default.nix b/pkgs/development/python-modules/b2sdk/default.nix
index fcbbddb6144..b4a3e7acaec 100644
--- a/pkgs/development/python-modules/b2sdk/default.nix
+++ b/pkgs/development/python-modules/b2sdk/default.nix
@@ -1,20 +1,27 @@
-{ lib, buildPythonPackage, fetchPypi, setuptools_scm, isPy27, pytestCheckHook
+{ lib, buildPythonPackage, fetchPypi, setuptools-scm, isPy27, pytestCheckHook
 , requests, arrow, logfury, tqdm }:
 
 buildPythonPackage rec {
   pname = "b2sdk";
-  version = "1.4.0";
+  version = "1.6.0";
 
   disabled = isPy27;
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "fb82cbaef5dd7499b62622010fc8e328944ca8cbdd00b485530ab6600de1129d";
+    sha256 = "sha256-6fjreuMUC056ljddfAidfBbJkvEDndB/dIkx1bF7efs=";
   };
 
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace 'setuptools_scm<6.0' 'setuptools_scm'
+    substituteInPlace requirements.txt \
+      --replace 'arrow>=0.8.0,<1.0.0' 'arrow'
+  '';
+
   pythonImportsCheck = [ "b2sdk" ];
 
-  nativebuildInputs = [ setuptools_scm ];
+  nativeBuildInputs = [ setuptools-scm ];
   propagatedBuildInputs = [ requests arrow logfury tqdm ];
 
   # requires unpackaged dependencies like liccheck
diff --git a/pkgs/development/python-modules/brother/default.nix b/pkgs/development/python-modules/brother/default.nix
index e4f9d63bd6b..9f41ed5756f 100644
--- a/pkgs/development/python-modules/brother/default.nix
+++ b/pkgs/development/python-modules/brother/default.nix
@@ -13,14 +13,14 @@
 
 buildPythonPackage rec {
   pname = "brother";
-  version = "0.2.2";
+  version = "1.0.0";
   disabled = pythonOlder "3.8";
 
   src = fetchFromGitHub {
     owner = "bieniu";
     repo = pname;
     rev = version;
-    sha256 = "sha256-vIefcL3K3ZbAUxMFM7gbbTFdrnmufWZHcq4OA19SYXE=";
+    sha256 = "sha256-0NfqPlQiOkNhR+H55E9LE4dGa9R8vcSyPNbbIeiRJV8=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/diff_cover/default.nix b/pkgs/development/python-modules/diff_cover/default.nix
index e9f6184c528..5c340bf7ac8 100644
--- a/pkgs/development/python-modules/diff_cover/default.nix
+++ b/pkgs/development/python-modules/diff_cover/default.nix
@@ -1,4 +1,5 @@
 { lib, buildPythonPackage, fetchPypi
+, chardet
 , inflect
 , jinja2
 , jinja2_pluralize
@@ -27,7 +28,7 @@ buildPythonPackage rec {
     sha256 = "e80f7a4979b7a9d373903776588279ed2898f17729e608255c4119462c822edb";
   };
 
-  propagatedBuildInputs = [ jinja2 jinja2_pluralize pygments six inflect ];
+  propagatedBuildInputs = [ chardet jinja2 jinja2_pluralize pygments six inflect ];
 
   checkInputs = [ mock coverage pytest nose pylint pyflakes pycodestyle ];
 
diff --git a/pkgs/development/python-modules/django_silk/default.nix b/pkgs/development/python-modules/django_silk/default.nix
index 653bcdc5551..b1d4eaec5c9 100644
--- a/pkgs/development/python-modules/django_silk/default.nix
+++ b/pkgs/development/python-modules/django_silk/default.nix
@@ -9,6 +9,7 @@
 , simplejson
 , dateutil
 , requests
+, setuptools-scm
 , sqlparse
 , jinja2
 , autopep8
@@ -52,6 +53,7 @@ buildPythonPackage rec {
       --replace 'use_scm_version=True' 'version="${version}"'
   '';
 
+  nativeBuildInputs = [ setuptools-scm ];
   buildInputs = [ mock ];
   propagatedBuildInputs = [
     django pygments simplejson dateutil requests
diff --git a/pkgs/development/python-modules/flask-caching/default.nix b/pkgs/development/python-modules/flask-caching/default.nix
index 8182344487e..708c5c351ea 100644
--- a/pkgs/development/python-modules/flask-caching/default.nix
+++ b/pkgs/development/python-modules/flask-caching/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildPythonPackage, fetchPypi, isPy27, flask, pytest, pytestcov, pytest-xprocess, pytestcache }:
+{ lib, buildPythonPackage, fetchPypi, isPy27, flask, pytestCheckHook, pytestcov, pytest-xprocess, pytestcache }:
 
 buildPythonPackage rec {
   pname = "Flask-Caching";
@@ -12,12 +12,15 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [ flask ];
 
-  checkInputs = [ pytest pytestcov pytest-xprocess pytestcache ];
+  checkInputs = [ pytestCheckHook pytestcov pytest-xprocess pytestcache ];
 
-  # backend_cache relies on pytest-cache, which is a stale package from 2013
-  checkPhase = ''
-    pytest -k 'not backend_cache'
-  '';
+  disabledTests = [
+    # backend_cache relies on pytest-cache, which is a stale package from 2013
+    "backend_cache"
+    # optional backends
+    "Redis"
+    "Memcache"
+  ];
 
   meta = with lib; {
     description = "Adds caching support to your Flask application";
diff --git a/pkgs/development/python-modules/jupyter_server/default.nix b/pkgs/development/python-modules/jupyter_server/default.nix
index 1af7d693588..50f193c2058 100644
--- a/pkgs/development/python-modules/jupyter_server/default.nix
+++ b/pkgs/development/python-modules/jupyter_server/default.nix
@@ -4,6 +4,7 @@
 , pythonOlder
 , pytestCheckHook
 , pytest-tornasync
+, argon2_cffi
 , jinja2
 , tornado
 , pyzmq
@@ -36,6 +37,7 @@ buildPythonPackage rec {
   '';
 
   propagatedBuildInputs = [
+    argon2_cffi
     jinja2
     tornado
     pyzmq
@@ -64,7 +66,12 @@ buildPythonPackage rec {
   pytestFlagsArray = [ "jupyter_server/tests/" ];
 
   # disabled failing tests
-  disabledTests = [ "test_server_extension_list" "test_list_formats" "test_base_url" ];
+  disabledTests = [
+    "test_server_extension_list"
+    "test_list_formats"
+    "test_base_url"
+    "test_culling"
+  ];
 
   meta = with lib; {
     description = "The backend—i.e. core services, APIs, and REST endpoints—to Jupyter web applications.";
diff --git a/pkgs/development/python-modules/jupyterlab/default.nix b/pkgs/development/python-modules/jupyterlab/default.nix
index 513cce507e3..ba2c0ed4883 100644
--- a/pkgs/development/python-modules/jupyterlab/default.nix
+++ b/pkgs/development/python-modules/jupyterlab/default.nix
@@ -10,12 +10,12 @@
 
 buildPythonPackage rec {
   pname = "jupyterlab";
-  version = "3.0.12";
+  version = "3.0.14";
   disabled = pythonOlder "3.5";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "929c60d7fb4aa704084c02d8ededc209b8b378e0b3adab46158b7fa6acc24230";
+    sha256 = "sha256-cTqEmR38yowLwmCRHxvVSsJaOGqGKFcTuVVaYPeVBZs=";
   };
 
   nativeBuildInputs = [ jupyter-packaging ];
diff --git a/pkgs/development/python-modules/keyring/default.nix b/pkgs/development/python-modules/keyring/default.nix
index 79283ff6e77..6ebc99f5732 100644
--- a/pkgs/development/python-modules/keyring/default.nix
+++ b/pkgs/development/python-modules/keyring/default.nix
@@ -1,4 +1,8 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, pythonOlder, fetchpatch
+{ lib
+, stdenv
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
 , setuptools-scm
 , importlib-metadata
 , dbus-python
@@ -21,10 +25,6 @@ buildPythonPackage rec {
     setuptools-scm
   ];
 
-  checkInputs = [
-    pytestCheckHook
-  ];
-
   propagatedBuildInputs = [
     # this should be optional, however, it has a different API
     importlib-metadata # see https://github.com/jaraco/keyring/issues/503#issuecomment-798973205
@@ -34,7 +34,25 @@ buildPythonPackage rec {
     secretstorage
   ];
 
-  pythonImportsCheck = [ "keyring" "keyring.backend" ];
+  pythonImportsCheck = [
+    "keyring"
+    "keyring.backend"
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  # Keychain communications isn't possible in our build environment
+  # keyring.errors.KeyringError: Can't get password from keychain: (-25307, 'Unknown Error')
+  disabledTests = lib.optionals (stdenv.isDarwin) [
+    "test_multiprocess_get"
+    "test_multiprocess_get_after_native_get"
+  ];
+
+  disabledTestsPaths = [
+    "tests/backends/test_macOS.py"
+  ];
 
   meta = with lib; {
     description = "Store and access your passwords safely";
diff --git a/pkgs/development/python-modules/poetry-core/default.nix b/pkgs/development/python-modules/poetry-core/default.nix
index bec70aacca7..4d8c444dcd2 100644
--- a/pkgs/development/python-modules/poetry-core/default.nix
+++ b/pkgs/development/python-modules/poetry-core/default.nix
@@ -23,6 +23,13 @@ buildPythonPackage rec {
     sha256 = "07x0zagf9cfr7g3132jjd5byywkbnzpfbxjfjzpzpj70fqw70qrc";
   };
 
+  postPatch = lib.optionalString (pythonOlder "3.8") ''
+    # remove >1.0.3
+    substituteInPlace pyproject.toml \
+      --replace 'importlib-metadata = {version = "^1.7.0", python = "~2.7 || >=3.5, <3.8"}' \
+        'importlib-metadata = {version = ">=1.7.0", python = "~2.7 || >=3.5, <3.8"}'
+  '';
+
   nativeBuildInputs = [
     intreehooks
   ];
diff --git a/pkgs/development/python-modules/pyramid/default.nix b/pkgs/development/python-modules/pyramid/default.nix
index da9569b7fb7..a26eff37ef2 100644
--- a/pkgs/development/python-modules/pyramid/default.nix
+++ b/pkgs/development/python-modules/pyramid/default.nix
@@ -18,11 +18,11 @@
 
 buildPythonPackage rec {
   pname = "pyramid";
-  version = "2.0";
+  version = "1.10.5";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "45431b387587ed0fac6213b54d6e9f0936f0cc85238a8f5af7852fc9484c5c77";
+    sha256 = "fe1bd1140e6b79fe07f0053981d49be2dc66656cc8b481dd7ffcaa872fc25467";
   };
 
   checkInputs = [ webtest zope_component ];
diff --git a/pkgs/development/python-modules/python-frontmatter/default.nix b/pkgs/development/python-modules/python-frontmatter/default.nix
index 9afa43bf393..e00ef7d9dee 100644
--- a/pkgs/development/python-modules/python-frontmatter/default.nix
+++ b/pkgs/development/python-modules/python-frontmatter/default.nix
@@ -1,6 +1,6 @@
-{ lib, fetchFromGitHub, python3Packages }:
+{ lib, fetchFromGitHub, buildPythonPackage, pyyaml, six, pytest, pyaml }:
 
-python3Packages.buildPythonPackage rec {
+buildPythonPackage rec {
   pname = "python-frontmatter";
   version = "1.0.0";
 
@@ -11,20 +11,26 @@ python3Packages.buildPythonPackage rec {
     sha256 = "0flyh2pb0z4lq66dmmsgyakvg11yhkp4dk7qnzanl34z7ikp97bx";
   };
 
-  propagatedBuildInputs = with python3Packages; [
+  propagatedBuildInputs = [
     pyyaml
+    pyaml # yes, it's needed
     six
   ];
 
-  checkInputs = with python3Packages; [
+  # tries to import test.test, which conflicts with module
+  # exported by python interpreter
+  doCheck = false;
+  checkInputs = [
     pytest
   ];
 
+  pythonImportsCheck = [ "frontmatter" ];
+
   meta = with lib; {
     homepage = "https://github.com/eyeseast/python-frontmatter";
     description = "Parse and manage posts with YAML (or other) frontmatter";
     license = licenses.mit;
     maintainers = with maintainers; [ siraben ];
-    platforms = lib.platforms.unix;
+    platforms = platforms.unix;
   };
 }
diff --git a/pkgs/development/python-modules/sqlalchemy-citext/default.nix b/pkgs/development/python-modules/sqlalchemy-citext/default.nix
index f701da57724..8fc03d788af 100644
--- a/pkgs/development/python-modules/sqlalchemy-citext/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-citext/default.nix
@@ -1,6 +1,7 @@
 { lib
 , buildPythonPackage
 , fetchPypi
+, psycopg2
 , sqlalchemy
 , python
 }:
@@ -16,6 +17,9 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [
     sqlalchemy
+
+    # not listed in `install_requires`, but is imported in citext/__init__.py
+    psycopg2
   ];
 
   # tests are not packaged in pypi tarball
diff --git a/pkgs/development/python-modules/telfhash/default.nix b/pkgs/development/python-modules/telfhash/default.nix
new file mode 100644
index 00000000000..a7aca8866ed
--- /dev/null
+++ b/pkgs/development/python-modules/telfhash/default.nix
@@ -0,0 +1,49 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, capstone
+, pyelftools
+, tlsh
+, nose
+}:
+buildPythonPackage {
+  pname = "telfhash";
+  version = "unstable-2021-01-29";
+
+  src = fetchFromGitHub {
+    owner = "trendmicro";
+    repo = "telfhash";
+    rev = "b5e398e59dc25a56a28861751c1fccc74ef71617";
+    sha256 = "jNu6qm8Q/UyJVaCqwFOPX02xAR5DwvCK3PaH6Fvmakk=";
+  };
+
+  # The tlsh library's name is just "tlsh"
+  postPatch = ''
+    substituteInPlace requirements.txt --replace "python-tlsh" "tlsh"
+  '';
+
+  propagatedBuildInputs = [
+    capstone
+    pyelftools
+    tlsh
+  ];
+
+  checkInputs = [
+    nose
+  ];
+
+  checkPhase = ''
+    nosetests
+  '';
+
+  pythonImportsCheck = [
+    "telfhash"
+  ];
+
+  meta = with lib; {
+    description = "Symbol hash for ELF files";
+    homepage = "https://github.com/trendmicro/telfhash";
+    license = licenses.asl20;
+    maintainers = teams.determinatesystems.members;
+  };
+}
diff --git a/pkgs/development/python-modules/zwave-js-server-python/default.nix b/pkgs/development/python-modules/zwave-js-server-python/default.nix
new file mode 100644
index 00000000000..61dba04a79e
--- /dev/null
+++ b/pkgs/development/python-modules/zwave-js-server-python/default.nix
@@ -0,0 +1,40 @@
+{ lib
+, aiohttp
+, buildPythonPackage
+, fetchFromGitHub
+, pytest-aiohttp
+, pytestCheckHook
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "zwave-js-server-python";
+  version = "0.23.1";
+  disabled = pythonOlder "3.8";
+
+
+  src = fetchFromGitHub {
+    owner = "home-assistant-libs";
+    repo = pname;
+    rev = version;
+    sha256 = "0kmmhn357k22ana0ysd8jlz1fyfaqlc8k74ryaik0rrw7nmn1n11";
+  };
+
+  propagatedBuildInputs = [
+    aiohttp
+  ];
+
+  checkInputs = [
+    pytest-aiohttp
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [ "zwave_js_server" ];
+
+  meta = with lib; {
+    description = "Python wrapper for zwave-js-server";
+    homepage = "https://github.com/home-assistant-libs/zwave-js-server-python";
+    license = with licenses; [ asl20 ];
+    maintainers = with maintainers; [ fab ];
+  };
+}
diff --git a/pkgs/development/tools/gotestsum/default.nix b/pkgs/development/tools/gotestsum/default.nix
index 6c6d6343d43..e9bc48b0dcf 100644
--- a/pkgs/development/tools/gotestsum/default.nix
+++ b/pkgs/development/tools/gotestsum/default.nix
@@ -2,13 +2,13 @@
 
 buildGoModule rec {
   pname = "gotestsum";
-  version = "1.6.3";
+  version = "1.6.4";
 
   src = fetchFromGitHub {
     owner = "gotestyourself";
     repo = "gotestsum";
     rev = "v${version}";
-    sha256 = "sha256-xUDhJLTO3JZ7rlUUzcypUev60qmRK9zOlO2VYeXqT4o=";
+    sha256 = "sha256-5iSUk/J73enbc/N3bn7M4oj2A0yoF1jTWpnXD380hFI=";
   };
 
   vendorSha256 = "sha256-sHi8iW+ZV/coeAwDUYnSH039UNtUO9HK0Bhz9Gmtv8k=";
diff --git a/pkgs/development/tools/parsing/tree-sitter/default.nix b/pkgs/development/tools/parsing/tree-sitter/default.nix
index 0ce151f6507..293b8bb095a 100644
--- a/pkgs/development/tools/parsing/tree-sitter/default.nix
+++ b/pkgs/development/tools/parsing/tree-sitter/default.nix
@@ -71,6 +71,35 @@ let
     in
     lib.mapAttrs change grammars;
 
+  # Usage:
+  # pkgs.tree-sitter.withPlugins (p: [ p.tree-sitter-c p.tree-sitter-java ... ])
+  #
+  # or for all grammars:
+  # pkgs.tree-sitter.withPlugins (_: allGrammars)
+  # which is equivalent to
+  # pkgs.tree-sitter.withPlugins (p: builtins.attrValues p)
+  withPlugins = grammarFn:
+    let
+      grammars = grammarFn builtGrammars;
+    in
+    linkFarm "grammars"
+      (map
+        (drv:
+          let
+            name = lib.strings.getName drv;
+          in
+          {
+            name =
+              (lib.strings.removePrefix "tree-sitter-"
+                (lib.strings.removeSuffix "-grammar" name))
+              + stdenv.hostPlatform.extensions.sharedLibrary;
+            path = "${drv}/parser";
+          }
+        )
+        grammars);
+
+  allGrammars = builtins.attrValues builtGrammars;
+
 in
 rustPlatform.buildRustPackage {
   pname = "tree-sitter";
@@ -111,7 +140,7 @@ rustPlatform.buildRustPackage {
     updater = {
       inherit update-all-grammars;
     };
-    inherit grammars builtGrammars;
+    inherit grammars builtGrammars withPlugins allGrammars;
 
     tests = {
       # make sure all grammars build
diff --git a/pkgs/development/web/deno/default.nix b/pkgs/development/web/deno/default.nix
index a2e286d8bc5..4586477293b 100644
--- a/pkgs/development/web/deno/default.nix
+++ b/pkgs/development/web/deno/default.nix
@@ -5,6 +5,7 @@
 , rust
 , rustPlatform
 , installShellFiles
+, libiconv
 , libobjc
 , Security
 , CoreServices
@@ -28,7 +29,7 @@ rustPlatform.buildRustPackage rec {
   # Install completions post-install
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libobjc Security CoreServices Metal Foundation ];
+  buildInputs = lib.optionals stdenv.isDarwin [ libiconv libobjc Security CoreServices Metal Foundation ];
 
   # The rusty_v8 package will try to download a `librusty_v8.a` release at build time to our read-only filesystem
   # To avoid this we pre-download the file and place it in the locations it will require it in advance
diff --git a/pkgs/misc/vim-plugins/overrides.nix b/pkgs/misc/vim-plugins/overrides.nix
index 7e12d083c32..3e352977d56 100644
--- a/pkgs/misc/vim-plugins/overrides.nix
+++ b/pkgs/misc/vim-plugins/overrides.nix
@@ -50,6 +50,9 @@
 , CoreFoundation
 , CoreServices
 
+# nvim-treesitter dependencies
+, tree-sitter
+
   # sved dependencies
 , glib
 , gobject-introspection
@@ -364,6 +367,24 @@ self: super: {
     dependencies = with super; [ popfix ];
   });
 
+  # Usage:
+  # pkgs.vimPlugins.nvim-treesitter.withPlugins (p: [ p.tree-sitter-c p.tree-sitter-java ... ])
+  # or for all grammars:
+  # pkgs.vimPlugins.nvim-treesitter.withPlugins (_: tree-sitter.allGrammars)
+  nvim-treesitter = super.nvim-treesitter.overrideAttrs (old: {
+    passthru.withPlugins =
+      grammarFn: self.nvim-treesitter.overrideAttrs (_: {
+        postPatch =
+          let
+            grammars = tree-sitter.withPlugins grammarFn;
+          in
+          ''
+            rm -r parser
+            ln -s ${grammars} parser
+          '';
+      });
+  });
+
   onehalf = super.onehalf.overrideAttrs (old: {
     configurePhase = "cd vim";
   });
diff --git a/pkgs/os-specific/linux/displaylink/default.nix b/pkgs/os-specific/linux/displaylink/default.nix
index bd50852bd9d..ca3e38c2e70 100644
--- a/pkgs/os-specific/linux/displaylink/default.nix
+++ b/pkgs/os-specific/linux/displaylink/default.nix
@@ -20,17 +20,17 @@ let
 in
 stdenv.mkDerivation rec {
   pname = "displaylink";
-  version = "5.3.1.34";
+  version = "5.4.0-55.153";
 
   src = requireFile rec {
     name = "displaylink.zip";
-    sha256 = "1c1kbjgpb71f73qnyl44rvwi6l4ivddq789rwvvh0ahw2jm324hy";
+    sha256 = "1m2l3bnlfwfp94w7khr05npsbysg9mcyi7hi85n78xkd0xdcxml8";
     message = ''
       In order to install the DisplayLink drivers, you must first
       comply with DisplayLink's EULA and download the binaries and
       sources from here:
 
-      https://www.displaylink.com/downloads/file?id=1576
+      https://www.synaptics.com/node/3751
 
       Once you have downloaded the file, please use the following
       commands and re-run the installation:
diff --git a/pkgs/os-specific/linux/evdi/default.nix b/pkgs/os-specific/linux/evdi/default.nix
index 0f56d0e95ca..a8a0445e955 100644
--- a/pkgs/os-specific/linux/evdi/default.nix
+++ b/pkgs/os-specific/linux/evdi/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   pname = "evdi";
-  version = "v1.7.2";
+  version = "unstable-20210401";
 
   src = fetchFromGitHub {
     owner = "DisplayLink";
     repo = pname;
-    rev = version;
-    sha256 = "074j0xh037n8mc4isihfz9lap57wvxaxib32pvy6jhjl3wyik632";
+    rev = "b0b3d131b26df62664ca33775679eea7b70c47b1";
+    sha256 = "09apbvdc78bbqzja9z3b1wrwmqkv3k7cn3lll5gsskxjnqbhxk9y";
   };
 
   nativeBuildInputs = kernel.moduleBuildDependencies;
@@ -33,6 +33,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.linux;
     license = with licenses; [ lgpl21 gpl2 ];
     homepage = "https://www.displaylink.com/";
-    broken = versionOlder kernel.version "4.9" || stdenv.isAarch64;
+    broken = versionOlder kernel.version "4.19" || stdenv.isAarch64;
   };
 }
diff --git a/pkgs/servers/home-assistant/component-packages.nix b/pkgs/servers/home-assistant/component-packages.nix
index 4d86e743d15..d900ec7d743 100644
--- a/pkgs/servers/home-assistant/component-packages.nix
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -984,6 +984,6 @@
     "zone" = ps: with ps; [ ];
     "zoneminder" = ps: with ps; [ zm-py ];
     "zwave" = ps: with ps; [ aiohttp-cors homeassistant-pyozw paho-mqtt pydispatcher python-openzwave-mqtt ];
-    "zwave_js" = ps: with ps; [ aiohttp-cors ]; # missing inputs: zwave-js-server-python
+    "zwave_js" = ps: with ps; [ aiohttp-cors zwave-js-server-python ];
   };
 }
diff --git a/pkgs/servers/home-assistant/default.nix b/pkgs/servers/home-assistant/default.nix
index 9ba5f2c17a9..1186f52697a 100644
--- a/pkgs/servers/home-assistant/default.nix
+++ b/pkgs/servers/home-assistant/default.nix
@@ -27,6 +27,19 @@ let
     (mkOverride "astral" "1.10.1"
       "d2a67243c4503131c856cafb1b1276de52a86e5b8a1d507b7e08bee51cb67bf1")
 
+    # Pinned due to API changes in brother>=1.0, remove >= 2021.5
+    (self: super: {
+      brother = super.brother.overridePythonAttrs (oldAttrs: rec {
+        version = "0.2.2";
+        src = fetchFromGitHub {
+          owner = "bieniu";
+          repo = "brother";
+          rev = version;
+          sha256 = "sha256-vIefcL3K3ZbAUxMFM7gbbTFdrnmufWZHcq4OA19SYXE=";
+        };
+      });
+    })
+
     # Pinned due to API changes in iaqualink>=2.0, remove after
     # https://github.com/home-assistant/core/pull/48137 was merged
     (self: super: {
@@ -213,6 +226,7 @@ in with py.pkgs; buildPythonApplication rec {
     "axis"
     "bayesian"
     "binary_sensor"
+    "brother"
     "caldav"
     "calendar"
     "camera"
@@ -389,6 +403,7 @@ in with py.pkgs; buildPythonApplication rec {
     "zha"
     "zone"
     "zwave"
+    "zwave_js"
   ];
 
   pytestFlagsArray = [
diff --git a/pkgs/servers/monitoring/alertmanager-irc-relay/default.nix b/pkgs/servers/monitoring/alertmanager-irc-relay/default.nix
index c3c60e1d4a2..50cf5a00164 100644
--- a/pkgs/servers/monitoring/alertmanager-irc-relay/default.nix
+++ b/pkgs/servers/monitoring/alertmanager-irc-relay/default.nix
@@ -2,13 +2,13 @@
 
 buildGoModule rec {
   pname = "alertmanager-irc-relay";
-  version = "0.3.1";
+  version = "0.4.1";
 
   src = fetchFromGitHub {
     owner = "google";
     repo = "alertmanager-irc-relay";
     rev = "v${version}";
-    sha256 = "sha256-IlWXsQZtDXG8sJBV+82BzEFj+JtUbfTOZyqYOrZFTXA=";
+    sha256 = "sha256-02uEvcxT5+0OJtqOyuQjgkqL0fZnN7umCSxBqAVPT9U=";
   };
 
   vendorSha256 = "sha256-VLG15IXS/fXFMTCJKEqGW6qZ9aOLPhazidVsOywG+w4=";
diff --git a/pkgs/servers/quagga/default.nix b/pkgs/servers/quagga/default.nix
deleted file mode 100644
index 2e2fac575a6..00000000000
--- a/pkgs/servers/quagga/default.nix
+++ /dev/null
@@ -1,73 +0,0 @@
-{ lib, stdenv, fetchurl, libcap, libnl, readline, net-snmp, less, perl, texinfo,
-  pkg-config, c-ares }:
-
-stdenv.mkDerivation rec {
-  pname = "quagga";
-  version = "1.2.4";
-
-  src = fetchurl {
-    url = "mirror://savannah/quagga/${pname}-${version}.tar.gz";
-    sha256 = "1lsksqxij5f1llqn86pkygrf5672kvrqn1kvxghi169hqf1c0r73";
-  };
-
-  buildInputs =
-    [ readline net-snmp c-ares ]
-    ++ lib.optionals stdenv.isLinux [ libcap libnl ];
-
-  nativeBuildInputs = [ pkg-config perl texinfo ];
-
-  configureFlags = [
-    "--sysconfdir=/etc/quagga"
-    "--localstatedir=/run/quagga"
-    "--sbindir=$(out)/libexec/quagga"
-    "--disable-exampledir"
-    "--enable-user=quagga"
-    "--enable-group=quagga"
-    "--enable-configfile-mask=0640"
-    "--enable-logfile-mask=0640"
-    "--enable-vtysh"
-    "--enable-vty-group=quaggavty"
-    "--enable-snmp"
-    "--enable-multipath=64"
-    "--enable-rtadv"
-    "--enable-irdp"
-    "--enable-opaque-lsa"
-    "--enable-ospf-te"
-    "--enable-pimd"
-    "--enable-isis-topology"
-  ];
-
-  preConfigure = ''
-    substituteInPlace vtysh/vtysh.c --replace \"more\" \"${less}/bin/less\"
-  '';
-
-  postInstall = ''
-    rm -f $out/bin/test_igmpv3_join
-    mv -f $out/libexec/quagga/ospfclient $out/bin/
-  '';
-
-  enableParallelBuilding = true;
-
-  meta = with lib; {
-    description = "Quagga BGP/OSPF/ISIS/RIP/RIPNG routing daemon suite";
-    longDescription = ''
-      GNU Quagga is free software which manages TCP/IP based routing protocols.
-      It supports BGP4, BGP4+, OSPFv2, OSPFv3, IS-IS, RIPv1, RIPv2, and RIPng as
-      well as the IPv6 versions of these.
-
-      As the predecessor Zebra has been considered orphaned, the Quagga project
-      has been formed by members of the zebra mailing list and the former
-      zebra-pj project to continue developing.
-
-      Quagga uses threading if the kernel supports it, but can also run on
-      kernels that do not support threading. Each protocol has its own daemon.
-
-      It is more than a routed replacement, it can be used as a Route Server and
-      a Route Reflector.
-    '';
-    homepage = "https://www.nongnu.org/quagga/";
-    license = licenses.gpl2;
-    platforms = platforms.unix;
-    maintainers = with maintainers; [ ];
-  };
-}
diff --git a/pkgs/servers/x11/xorg/overrides.nix b/pkgs/servers/x11/xorg/overrides.nix
index 3f88c0e0c99..6ab9f8ed8dd 100644
--- a/pkgs/servers/x11/xorg/overrides.nix
+++ b/pkgs/servers/x11/xorg/overrides.nix
@@ -773,6 +773,14 @@ self: super:
       "--with-launchdaemons-dir=\${out}/LaunchDaemons"
       "--with-launchagents-dir=\${out}/LaunchAgents"
     ];
+    patches = [
+      # don't unset DBUS_SESSION_BUS_ADDRESS in startx
+      (fetchpatch {
+        name = "dont-unset-DBUS_SESSION_BUS_ADDRESS.patch";
+        url = "https://git.archlinux.org/svntogit/packages.git/plain/repos/extra-x86_64/fs46369.patch?h=packages/xorg-xinit&id=40f3ac0a31336d871c76065270d3f10e922d06f3";
+        sha256 = "18kb88i3s9nbq2jxl7l2hyj6p56c993hivk8mzxg811iqbbawkp7";
+      })
+    ];
     propagatedBuildInputs = attrs.propagatedBuildInputs or [] ++ [ self.xauth ]
                          ++ lib.optionals isDarwin [ self.libX11 self.xorgproto ];
     postFixup = ''
diff --git a/pkgs/tools/admin/exoscale-cli/default.nix b/pkgs/tools/admin/exoscale-cli/default.nix
index c098fa278b3..3f0aca33d61 100644
--- a/pkgs/tools/admin/exoscale-cli/default.nix
+++ b/pkgs/tools/admin/exoscale-cli/default.nix
@@ -2,13 +2,13 @@
 
 buildGoPackage rec {
   pname = "exoscale-cli";
-  version = "1.27.2";
+  version = "1.28.0";
 
   src = fetchFromGitHub {
     owner  = "exoscale";
     repo   = "cli";
     rev    = "v${version}";
-    sha256 = "sha256-Wq3CWKYuF4AaOVpe0sGn9BzLx/6rSPFN6rFc2jUUVEA=";
+    sha256 = "sha256-YbWh4ZIlcxAD/8F/fsYIWjv5hKaHNNi+sNrD7Ax/xDw=";
   };
 
   goPackagePath = "github.com/exoscale/cli";
diff --git a/pkgs/tools/graphics/agi/default.nix b/pkgs/tools/graphics/agi/default.nix
index 3fe6698846e..aca53c25461 100644
--- a/pkgs/tools/graphics/agi/default.nix
+++ b/pkgs/tools/graphics/agi/default.nix
@@ -14,11 +14,11 @@
 
 stdenv.mkDerivation rec {
   pname = "agi";
-  version = "1.1.0-dev-20210413";
+  version = "1.1.0-dev-20210421";
 
   src = fetchzip {
     url = "https://github.com/google/agi-dev-releases/releases/download/v${version}/agi-${version}-linux.zip";
-    sha256 = "13i6n95d0cjrhx68qsich6xzk5f9ga0y3m19k4z2d58s164rnh0v";
+    sha256 = "sha256-2IgGvQy6omDEwrzQDfa/OLi3f+Q2zarvJVGk6ZhsjSA=";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index b52ce922e78..5097794b16c 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -610,6 +610,7 @@ mapAliases ({
   phonon = throw "phonon: Please use libsForQt5.phonon, as Qt4 support in this package has been removed."; # added 2019-11-22
   pynagsystemd = throw "pynagsystemd was removed as it was unmaintained and incompatible with recent systemd versions. Instead use its fork check_systemd."; # added 2020-10-24
   python2nix = throw "python2nix has been removed as it is outdated. Use e.g. nixpkgs-pytools instead."; # added 2021-03-08
+  quagga = throw "quagga is no longer maintained upstream"; # added 2021-04-22
   qca-qt5 = libsForQt5.qca-qt5;  # added 2015-12-19
   qcsxcad = libsForQt5.qcsxcad;  # added 2020-11-05
   qmk_firmware = throw "qmk_firmware has been removed because it was broken"; # added 2021-04-02
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index c0e5b3f9d7e..1e33a921552 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -19138,8 +19138,6 @@ in
 
   qremotecontrol-server = callPackage ../servers/misc/qremotecontrol-server { };
 
-  quagga = callPackage ../servers/quagga { };
-
   rabbitmq-server = callPackage ../servers/amqp/rabbitmq-server {
     inherit (darwin.apple_sdk.frameworks) AppKit Carbon Cocoa;
     elixir = beam_nox.interpreters.elixir_1_8;
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 82a94a27acf..4e24fc95c7d 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -7743,6 +7743,8 @@ in {
 
   telethon-session-sqlalchemy = callPackage ../development/python-modules/telethon-session-sqlalchemy { };
 
+  telfhash = callPackage ../development/python-modules/telfhash { };
+
   tempita = callPackage ../development/python-modules/tempita { };
 
   tempora = callPackage ../development/python-modules/tempora { };
@@ -8754,5 +8756,7 @@ in {
 
   zulip = callPackage ../development/python-modules/zulip { };
 
+  zwave-js-server-python = callPackage ../development/python-modules/zwave-js-server-python { };
+
   zxcvbn = callPackage ../development/python-modules/zxcvbn { };
 }