diff --git a/pkgs/applications/networking/instant-messengers/rambox/default.nix b/pkgs/applications/networking/instant-messengers/rambox/default.nix
index 8782a4bc5be..418d490bbd5 100644
--- a/pkgs/applications/networking/instant-messengers/rambox/default.nix
+++ b/pkgs/applications/networking/instant-messengers/rambox/default.nix
@@ -4,16 +4,16 @@ let
   mkRambox = opts: callPackage (import ./rambox.nix opts) { };
 in mkRambox rec {
   pname = "rambox";
-  version = "0.7.7";
+  version = "0.7.8";
 
   src = {
     x86_64-linux = fetchurl {
       url = "https://github.com/ramboxapp/community-edition/releases/download/${version}/Rambox-${version}-linux-x86_64.AppImage";
-      sha256 = "0f82hq0dzcjicdz6lkzj8889y100yqciqrwh8wjjy9pxkhjcdini";
+      sha256 = "1y3c9xh8594ay95rj9vaqxxzibwpc38n7ixxi2wnsrdbrqrwlc63";
     };
     i686-linux = fetchurl {
       url = "https://github.com/ramboxapp/community-edition/releases/download/${version}/Rambox-${version}-linux-i386.AppImage";
-      sha256 = "1nhgqjha10jvyf9nsghvlkibg7byj8qz140639ygag9qlpd52rfs";
+      sha256 = "07sv384nd2i701fkjgsrlib8jfsa01bvj60gnqdwlnpphlknga3h";
     };
   }.${stdenv.system} or (throw "Unsupported system: ${stdenv.system}");
 
@@ -24,8 +24,5 @@ in mkRambox rec {
     maintainers = with maintainers; [ ];
     platforms = ["i686-linux" "x86_64-linux"];
     hydraPlatforms = [];
-    knownVulnerabilities = [
-      "Electron 7.2.4 is EOL and contains at least the following vulnerabilities: CVE-2020-6458, CVE-2020-6460 and more (https://www.electronjs.org/releases/stable?version=7). Consider using an alternative such as `ferdi'."
-    ];
   };
 }
diff --git a/pkgs/applications/networking/instant-messengers/rambox/rambox.nix b/pkgs/applications/networking/instant-messengers/rambox/rambox.nix
index 56930f561c7..df038611c3b 100644
--- a/pkgs/applications/networking/instant-messengers/rambox/rambox.nix
+++ b/pkgs/applications/networking/instant-messengers/rambox/rambox.nix
@@ -1,6 +1,6 @@
 { pname, version, src, meta, desktopName ? "Rambox" }:
 
-{ appimageTools, lib, fetchurl, makeDesktopItem }:
+{ appimageTools, lib, fetchurl, gsettings-desktop-schemas, gtk3, makeDesktopItem }:
 
 let
   name = "${pname}-${version}";
@@ -19,6 +19,9 @@ let
   };
 in appimageTools.wrapType2 rec {
   inherit name src meta;
+  profile = ''
+    export XDG_DATA_DIRS=${gsettings-desktop-schemas}/share/gsettings-schemas/${gsettings-desktop-schemas.name}:${gtk3}/share/gsettings-schemas/${gtk3.name}:$XDG_DATA_DIRS
+  '';
 
   extraInstallCommands = ''
     mkdir -p $out/share/applications $out/share/icons/hicolor/256x256/apps
diff --git a/pkgs/development/tools/poetry2nix/poetry2nix/default.nix b/pkgs/development/tools/poetry2nix/poetry2nix/default.nix
index 22ab1214928..dae0a02b617 100644
--- a/pkgs/development/tools/poetry2nix/poetry2nix/default.nix
+++ b/pkgs/development/tools/poetry2nix/poetry2nix/default.nix
@@ -5,7 +5,7 @@
 }:
 let
   # Poetry2nix version
-  version = "1.20.0";
+  version = "1.21.0";
 
   inherit (poetryLib) isCompatible readTOML moduleName;
 
@@ -339,6 +339,9 @@ lib.makeScope pkgs.newScope (self: {
             ) { inherit app; };
           };
 
+          # Extract position from explicitly passed attrs so meta.position won't point to poetry2nix internals
+          pos = builtins.unsafeGetAttrPos (lib.elemAt (lib.attrNames attrs) 0) attrs;
+
           meta = lib.optionalAttrs (lib.hasAttr "description" pyProject.tool.poetry)
             {
               inherit (pyProject.tool.poetry) description;
diff --git a/pkgs/development/tools/poetry2nix/poetry2nix/overrides.nix b/pkgs/development/tools/poetry2nix/poetry2nix/overrides.nix
index daf536561f1..ab1a5324c98 100644
--- a/pkgs/development/tools/poetry2nix/poetry2nix/overrides.nix
+++ b/pkgs/development/tools/poetry2nix/poetry2nix/overrides.nix
@@ -156,6 +156,12 @@ self: super:
     }
   );
 
+  cheroot = super.cheroot.overridePythonAttrs (
+    old: {
+      dontPreferSetupPy = true;
+    }
+  );
+
   colour = super.colour.overridePythonAttrs (
     old: {
       buildInputs = (old.buildInputs or [ ]) ++ [ self.d2to1 ];
@@ -547,6 +553,7 @@ self: super:
         self.pytestrunner
         self.cryptography
         self.pyjwt
+        self.setuptools-scm-git-archive
       ];
     }
   );