diff --git a/config/domains.nix b/config/domains.nix
index 756180e..3308862 100644
--- a/config/domains.nix
+++ b/config/domains.nix
@@ -47,7 +47,7 @@
       local-networks = [ ];
 
       local-users = [ "niten" "viator" ];
-      local-groups = [ "admin" ];
+      local-groups = [ "admin" "informis" ];
       local-admins = [ "niten" ];
       admin-email = "viator@informis.land";
       gssapi-realm = "INFORMIS.LAND";
diff --git a/config/groups.nix b/config/groups.nix
index 0333c2f..73a7c6f 100644
--- a/config/groups.nix
+++ b/config/groups.nix
@@ -75,5 +75,14 @@
         "xiaoxuan"
       ];
     };
+
+    informis = {
+      gid = 1003;
+      description = "Informis User Group";
+      members = [
+        "niten"
+        "viator"
+      ];
+    };
   };
-}
\ No newline at end of file
+}
diff --git a/config/host-config/procul.nix b/config/host-config/procul.nix
index 28178bb..5179594 100644
--- a/config/host-config/procul.nix
+++ b/config/host-config/procul.nix
@@ -50,7 +50,27 @@ in {
     };
   };
 
+  informis.cl-gemini = {
+    enable = true;
+
+    hostname = "gemini.informis.land";
+    server-ip = host-ipv4;
+    document-root = "/srv/gemini/root";
+    textfiles-archive = "${pkgs.textfiles}";
+    slynk-port = 4005;
+
+    feeds = {
+      viator = {
+        title = "viator's phlog";
+        path = "/home/viator/gemini-public/feed/";
+        url = "gemini://informis.land/user/viator/feed/";
+      };
+    };    
+  };
+
   fudo = {
+    hosts.procul.external-interfaces = [ "extif0" ];
+    
     client.dns = {
       enable = true;
       ipv4 = true;
@@ -80,20 +100,6 @@ in {
       allowed-networks = [ "1.1.1.1/32" "1.0.0.1/32" "localhost" "link-local" ];
     };
 
-    # networks."informis.land" = {      
-    #   hosts = {
-    #     procul = {
-    #       ipv4-address = host-ipv4;
-    #     };
-    #   };
-      
-    #   verbatim-dns-records = [
-    #     ''_kerberos IN TXT "INFORMIS.LAND"''
-    #     ''@ IN TXT "v=spf1 mx ip4:${host-ipv4}/29 -all"''
-    #     ''@ IN SPF "v=spf1 mx ip4:${host-ipv4}/29 -all"''
-    #   ];
-    # };
-
     dns = {
       enable = true;
       identity = "procul.informis.land";
diff --git a/config/hosts/procul.nix b/config/hosts/procul.nix
index b5f3800..4fdc024 100644
--- a/config/hosts/procul.nix
+++ b/config/hosts/procul.nix
@@ -14,4 +14,5 @@
   profile = "server";
   ssh-pubkey =
     "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKEsvl1mTSWJJrqXbYrc8wYdlOiW5gNg4Nzf2QCxB6XW";
+  tmp-on-tmpfs = false;
 }
diff --git a/lib/fudo/dns.nix b/lib/fudo/dns.nix
index 74967c6..133d909 100644
--- a/lib/fudo/dns.nix
+++ b/lib/fudo/dns.nix
@@ -120,6 +120,11 @@ in {
   };
 
   config = mkIf cfg.enable {
+    networking.firewall = {
+      allowedTCPPorts = [ 53 ];
+      allowedUDPPorts = [ 53 ];
+    };
+    
     services.nsd = {
       enable = true;
       identity = cfg.identity;
@@ -135,9 +140,9 @@ in {
 
             @ IN SOA ns1.${dom}. hostmaster.${dom}. (
               ${toString builtins.currentTime}
-              5m
+              30m
               2m
-              6w
+              3w
               5m)
 
             ${optionalString (dom-cfg.default-host != null)
diff --git a/lib/fudo/git.nix b/lib/fudo/git.nix
index 8b6721e..2702280 100644
--- a/lib/fudo/git.nix
+++ b/lib/fudo/git.nix
@@ -120,15 +120,15 @@ in {
           enable = true;
           clonePort = cfg.ssh.listen-port;
         };
-        # settings = mkIf (cfg.ssh != null) {
-        #   server = {
-        #     START_SSH_SERVER = true;
-        #     SSH_DOMAIN = cfg.hostname;
-        #     SSH_PORT = cfg.ssh.listen-port;
-        #     SSH_LISTEN_PORT = cfg.ssh.listen-port;
-        #     SSH_LISTEN_HOST = cfg.ssh.listen-ip;
-        #   };
-        # };
+        settings = mkIf (cfg.ssh != null) {
+          server = {
+            START_SSH_SERVER = true;
+            SSH_DOMAIN = cfg.hostname;
+            # SSH_PORT = cfg.ssh.listen-port;
+            SSH_LISTEN_PORT = cfg.ssh.listen-port;
+            SSH_LISTEN_HOST = cfg.ssh.listen-ip;
+          };
+        };
       };
 
       nginx = {
diff --git a/lib/fudo/kdc.nix b/lib/fudo/kdc.nix
index 3e274c7..2dc86ec 100644
--- a/lib/fudo/kdc.nix
+++ b/lib/fudo/kdc.nix
@@ -32,7 +32,7 @@ let
     pkgs.writeShellScript "initialize-kdc-db.sh" ''
       if [ ! -e ${key-file} ]; then
         ${pkgs.heimdalFull}/bin/kstash --key-file=${key-file} --random-key
-        ${pkgs.heimdalFull}/bin/kadmin -l -c ${kdc-conf} -- init --realm-max-ticket-life="${max-lifetime}" --realm-max-renewable-life="${max-renewal}" RUS.SELBY.CA
+        ${pkgs.heimdalFull}/bin/kadmin -l -c ${kdc-conf} -- init --realm-max-ticket-life="${max-lifetime}" --realm-max-renewable-life="${max-renewal}" ${realm}
         ${add-hosts-principals realm kdc-conf}
         ${pkgs.heimdalFull}/bin/kadmin -l -c ${kdc-conf} -- ext_keytab --keytab=${primary-keytab} */${local-hostname}@${realm}
         ${pkgs.heimdalFull}/bin/kadmin -l -c ${kdc-conf} -- ext_keytab --keytab=${kadmin-keytab} kadmin/admin@${realm}
diff --git a/lib/fudo/mail.nix b/lib/fudo/mail.nix
index 3748e15..d59d626 100644
--- a/lib/fudo/mail.nix
+++ b/lib/fudo/mail.nix
@@ -177,6 +177,10 @@ in {
   ];
 
   config =  mkIf cfg.enable {
+    networking.firewall = {
+      allowedTCPPorts = [ 25 110 143 587 993 995 ];
+    };
+    
     users = {
       users = {
         mailuser = {
diff --git a/lib/informis/cl-gemini.nix b/lib/informis/cl-gemini.nix
index 80bcf47..75513bd 100644
--- a/lib/informis/cl-gemini.nix
+++ b/lib/informis/cl-gemini.nix
@@ -4,43 +4,7 @@ with lib;
 let
   cfg = config.informis.cl-gemini;
 
-  lisp-libs = with pkgs.lispPackages; [
-    asdf-package-system
-    asdf-system-connections
-    alexandria
-    asdf-package-system
-    asdf-system-connections
-    cl_plus_ssl
-    cl-ppcre
-    quicklisp
-    quri
-    uiop
-    usocket
-  ];
-
-  launchServer = ip: port: root: public-dir: key: cert: slynk-port: feeds-string: textfiles-archive:
-    pkgs.writeText "launch-server.lisp" ''
-      (load (merge-pathnames "quicklisp/setup.lisp" (user-homedir-pathname)))
-      (ql:quickload :slynk)
-      (ql:quickload :cl-gemini)
-      ${optionalString (slynk-port != null) "(slynk:create-server :port ${toString slynk-port} :dont-close t)"}
-      ${feeds-string}
-      (cl-gemini:start-gemini-server "${ip}" "${key}" "${cert}"
-        :port ${toString port}
-        :document-root "${root}"
-        :textfiles-root "${textfiles-archive}"
-        :file-cmd "${pkgs.file}/bin/file"
-        :log-stream *standard-output*
-        :threaded t
-        :separate-thread t)
-      (loop (sleep 60))
-    '';
-
-  sbcl-with-ssl = pkgs.sbcl.overrideAttrs (oldAttrs: rec {
-    extraLibs = with pkgs; [
-      openssl_1_1.dev
-    ];
-  });
+  lisp-helper = import ../lisp.nix { inherit pkgs; };
 
   feedOpts = with types; {
     options = {
@@ -71,6 +35,19 @@ let
     concatStringsSep "\n"
       (mapAttrsToList register-feed feeds);
 
+  ensure-certificates = hostname: user: key: cert: pkgs.writeShellScript "ensure-gemini-certificates.sh" ''
+    if [[ ! -e ${key} ]]; then
+      TARGET_CERT_DIR=$(${pkgs.coreutils}/bin/dirname ${cert})
+      TARGET_KEY_DIR=$(${pkgs.coreutils}/bin/dirname ${key})
+      if [[ ! -d $TARGET_CERT_DIR ]]; then mkdir -p $TARGET_CERT_DIR; fi
+      if [[ ! -d $TARGET_KEY_DIR ]]; then mkdir -p $TARGET_KEY_DIR; fi
+      ${pkgs.openssl}/bin/openssl req -new -subj "/CN=.${hostname}" -addext "subjectAltName = DNS:${hostname}, DNS:.${hostname}" -x509 -newkey ec -pkeyopt ec_paramgen_curve:prime256v1 -days 3650 -nodes -out ${cert} -keyout ${key}
+      ${pkgs.coreutils}/bin/chown -R ${user}:nogroup ${cert}
+      ${pkgs.coreutils}/bin/chown -R ${user}:nogroup ${key}
+      ${pkgs.coreutils}/bin/chmod 0444 ${cert}
+      ${pkgs.coreutils}/bin/chmod 0400 ${key}
+    fi
+  '';
 
 in {
   options.informis.cl-gemini = with types; {
@@ -82,6 +59,18 @@ in {
       default = 1965;
     };
 
+    hostname = mkOption {
+      type = str;
+      description = "Hostname at which the server is available (for generating the SSL certificate).";
+      example = "my.hostname.com";
+    };
+
+    user = mkOption {
+      type = str;
+      description = "User as which to run the cl-gemini server.";
+      default = "cl-gemini";
+    };
+
     server-ip = mkOption {
       type = str;
       description = "IP on which to serve Gemini traffic.";
@@ -101,15 +90,17 @@ in {
     };
 
     ssl-private-key = mkOption {
-      type = path;
+      type = str;
       description = "Path to the pem-encoded server private key.";
-      example = /path/to/secret/key.pem;
+      example = "/path/to/secret/key.pem";
+      default = "${config.users.users.cl-gemini.home}/private/server-key.pem";
     };
 
     ssl-certificate = mkOption {
-      type = path;
+      type = str;
       description = "Path to the pem-encoded server public certificate.";
-      example = /path/to/cert.pem;
+      example = "/path/to/cert.pem";
+      default = "${config.users.users.cl-gemini.home}/private/server-cert.pem";
     };
 
     slynk-port = mkOption {
@@ -140,73 +131,49 @@ in {
 
   config = mkIf cfg.enable {
 
-    environment.systemPackages = with pkgs; [
-      cl-gemini
-    ];
+    networking.firewall.allowedTCPPorts = [ cfg.port ];
 
     users.users = {
-      cl-gemini = {
+      ${cfg.user} = {
         isSystemUser = true;
         group = "nogroup";
         createHome = true;
-        home = "/var/lib/cl-gemini";
+        home = "/var/lib/${cfg.user}";
       };
     };
 
-    environment.etc = {
-      "cl-gemini/key.pem" = {
-        mode = "0400";
-        user = "cl-gemini";
-        source = cfg.ssl-private-key;
+    systemd.services = {
+      cl-gemini = {
+        description = "cl-gemini Gemini server (https://gemini.circumlunar.space/)";
+
+        serviceConfig = {
+          ExecStartPre = "${ensure-certificates cfg.hostname cfg.user cfg.ssl-private-key cfg.ssl-certificate}";
+          ExecStart = "${pkgs.cl-gemini}/bin/launch-server.sh";
+          Restart = "on-failure";
+          PIDFile = "/run/cl-gemini.$USERNAME.uid";
+          User = cfg.user;
+        };
+
+        environment = {
+          GEMINI_SLYNK_PORT = mkIf (cfg.slynk-port != null) (toString cfg.slynk-port);
+          GEMINI_LISTEN_IP = cfg.server-ip;
+          GEMINI_PRIVATE_KEY = cfg.ssl-private-key;
+          GEMINI_CERTIFICATE = cfg.ssl-certificate;
+          GEMINI_LISTEN_PORT = toString cfg.port;
+          GEMINI_DOCUMENT_ROOT = cfg.document-root;
+          GEMINI_TEXTFILES_ROOT = cfg.textfiles-archive;
+
+          CL_SOURCE_REGISTRY = lisp-helper.lisp-source-registry pkgs.cl-gemini;
+        };
+
+        path = with pkgs; [
+          gcc
+          file
+          getent
+        ];
+
+        wantedBy = [ "multi-user.target" ];
       };
-
-      "cl-gemini/cert.pem" = {
-        mode = "0444";
-        user = "cl-gemini";
-        source = cfg.ssl-certificate;
-      };
-    };
-
-    systemd.services.cl-gemini = {
-      description = "cl-gemini Gemini server (https://gemini.circumlunar.space/)";
-
-      serviceConfig = let
-        feed-registrations = register-feeds cfg.feeds;
-      in {
-        ExecStartPre = "${pkgs.lispPackages.quicklisp}/bin/quicklisp init";
-        ExecStart = "${sbcl-with-ssl}/bin/sbcl --load ${
-          launchServer
-            cfg.server-ip
-            cfg.port
-            cfg.document-root
-            cfg.user-public
-            "/etc/cl-gemini/key.pem"
-            "/etc/cl-gemini/cert.pem"
-            cfg.slynk-port
-            feed-registrations
-            cfg.textfiles-archive
-        }";
-        Restart = "on-failure";
-        PIDFile = "/run/cl-gemini.$USERNAME.uid";
-        User = "cl-gemini";
-      };
-
-      environment = {
-        LD_LIBRARY_PATH = "${pkgs.openssl_1_1.out}/lib";
-        CL_SOURCE_REGISTRY = concatStringsSep ":"
-          (["${config.users.users.cl-gemini.home}/quicklisp/quicklisp"] ++
-           (map
-             (pkg: "${pkg}//")
-             (lisp-libs ++ [pkgs.cl-gemini])));
-      };
-
-      path = with pkgs; [
-        gcc
-        file
-        getent
-      ];
-
-      wantedBy = [ "default.target" ];
     };
   };
 }
diff --git a/lib/lisp.nix b/lib/lisp.nix
new file mode 100644
index 0000000..4b6d63a
--- /dev/null
+++ b/lib/lisp.nix
@@ -0,0 +1,9 @@
+{ pkgs, ... }:
+
+with pkgs.lib;
+let
+in rec {
+  gather-dependencies = pkg: unique (pkg.propagatedBuildInputs ++ (concatMap gather-dependencies pkg.propagatedBuildInputs));
+  
+  lisp-source-registry = pkg: concatStringsSep ":" (map (p: "${p}//") (gather-dependencies pkg));
+}
diff --git a/packages/cl-gemini.nix b/packages/cl-gemini.nix
index 22ef42c..4373f5d 100644
--- a/packages/cl-gemini.nix
+++ b/packages/cl-gemini.nix
@@ -1,24 +1,62 @@
-{ stdenv, fetchgit, pkgs }:
+{ pkgs, localLispPackages, ... }:
 
+with pkgs.lib;
 let
-  url = "https://git.informis.land/viator/cl-gemini.git";
+  url = "https://git.informis.land/informis/cl-gemini.git";
   version = "0.1";
 
-in stdenv.mkDerivation {
+  server-launcher = pkgs.writeText "launch-cl-gemini.lisp" ''
+    (defun getenv-or-fail (env-var &optional default)
+      (let ((value (uiop:getenv env-var)))
+        (if (null value)
+            (if default
+                default
+                (uiop:die 1 "unable to find required env var: ~A" env-var))
+            value)))
+
+    (require :asdf)
+    (asdf:load-system :cl-gemini)
+    (let ((slynk-port (uiop:getenv "GEMINI_SLYNK_PORT")))
+      (when slynk-port
+        (asdf:load-system :slynk)
+        (slynk:create-server :port (parse-integer slynk-port) :dont-close t)))
+    (cl-gemini:start-gemini-server
+      (getenv-or-fail "GEMINI_LISTEN_IP")
+      (getenv-or-fail "GEMINI_PRIVATE_KEY")
+      (getenv-or-fail "GEMINI_CERTIFICATE")
+      :port (parse-integer (getenv-or-fail "GEMINI_LISTEN_PORT"))
+      :document-root (getenv-or-fail "GEMINI_DOCUMENT_ROOT")
+      :textfiles-root (getenv-or-fail "GEMINI_TEXTFILES_ROOT")
+      :log-stream *standard-output*
+      :threaded t
+      :separate-thread t)
+    (loop (sleep 10))
+  '';
+
+  server-wrapper = pkgs.writeShellScript "launch-server.sh" ''
+    ${pkgs.lispPackages.clwrapper}/bin/common-lisp.sh --load ${server-launcher}
+  '';
+
+  sbcl-with-ssl = pkgs.sbcl.overrideAttrs (oldAttrs: rec {
+    buildInputs = oldAttrs.buildInputs ++ [
+      pkgs.openssl_1_1.dev
+    ];
+  });
+    
+
+in pkgs.stdenv.mkDerivation {
   name = "cl-gemini-${version}";
 
-  src = fetchgit {
-    url = "https://git.informis.land/viator/cl-gemini.git";
-    rev = "3de4d1945fc91d0c9f8f65a5d4b0d3f39fbdaa80";
-    sha256 = "1xzfsp5vp36a3yas5pnhj2a1dd72r72fw3l49ah19hvbapaikhsw";
-    fetchSubmodules = false;
-  };
+  propagatedBuildInputs = with pkgs; [
+    asdf
+    sbcl-with-ssl
+    localLispPackages.cl-gemini
+  ];
 
   phases = ["installPhase"];
 
   installPhase = ''
-    mkdir -p "$out/lib/common-lisp/cl-gemini"
-    cp "$src/cl-gemini.asd" "$out/lib/common-lisp/cl-gemini"
-    cp -R "$src/src" "$out/lib/common-lisp/cl-gemini"
+    mkdir -p $out/bin
+    cp "${server-wrapper}" "$out/bin/launch-server.sh"
   '';
 }
diff --git a/packages/default.nix b/packages/default.nix
index 1f3b512..495eb6b 100644
--- a/packages/default.nix
+++ b/packages/default.nix
@@ -66,9 +66,6 @@ in {
       buildInputs = oldAttrs.buildInputs ++ [ pkgs.krb5 ];
     });
 
-    gtk3-x11 = pkgs.gtk3.overrideAttrs
-      (oldAttrs: rec { buildInputs = oldAttrs.buildInputs ++ [ pkgs.cmake ]; });
-
     hll2380dw-cups = import ./hll2380dw-cups.nix {
       inherit (pkgs)
         stdenv fetchurl makeWrapper cups dpkg a2ps ghostscript gnugrep gnused
@@ -83,9 +80,7 @@ in {
     };
 
     cl-gemini = import ./cl-gemini.nix {
-      pkgs = pkgs;
-      stdenv = pkgs.stdenv;
-      fetchgit = pkgs.fetchgit;
+      inherit pkgs localLispPackages;
     };
 
     fudo-service = import ./fudo-service.nix {
@@ -145,9 +140,8 @@ in {
     '';
 
     localLispPackages = (import ./lisp {
-      inherit lib;
-      pkgs = unstablePkgs;
-    }) // unstablePkgs.lispPackages;
+      inherit pkgs localLispPackages;
+    }) // pkgs.lispPackages;
 
     backplane-dns-server = import ./backplane-dns-server.nix {
       inherit localLispPackages;
@@ -167,5 +161,11 @@ in {
       rev = "5b7dd0ca9014e642e1f2d0aa3154b5da869911d3";
       sha256 = "061k0f0jgm5k81djslb172xk0wkis0m878izgisyj2qgg3wf1awh";
     };
+
+    textfiles = pkgs.fetchgit {
+      url = "https://git.informis.land/informis/textfiles.git";
+      rev = "278a90f7ce219e36e5de0a80b540e469a9bce912";
+      sha256 = "06qns3ayc84mamdgn0jw652rvx60wy9km1vxm2361mzmx2zk89iw";
+    };
   };
 }
diff --git a/packages/lisp/cl-gemini.nix b/packages/lisp/cl-gemini.nix
new file mode 100644
index 0000000..a282ec5
--- /dev/null
+++ b/packages/lisp/cl-gemini.nix
@@ -0,0 +1,42 @@
+{ pkgs, localLispPackages, ... }:
+
+let
+  url = "https://git.informis.land/informis/cl-gemini.git";
+  rev = "1d5075c23237deec536f62ed5dc06f3845eacf6b";
+  sha256 = "0j7gz3c83cgishsraqvm1dw42x5c1ydx26jrmkvykljyfhisyjpm";
+  
+in pkgs.lispPackages.buildLispPackage {
+  baseName = "cl-gemini";
+  packageName = "cl-gemini";
+  description = "Gemini server written in Common Lisp.";
+
+  buildSystems = [ "cl-gemini" ];
+
+  src = pkgs.fetchgit {
+    url = url;
+    rev = rev;
+    sha256 = sha256;
+    fetchSubmodules = false;
+  };
+  
+  deps = with localLispPackages; [
+    alexandria
+    arrows
+    asdf-package-system
+    asdf-system-connections
+    cl_plus_ssl
+    cl-ppcre
+    fare-mop
+    file-types
+    inferior-shell
+    local-time
+    osicat
+    quicklisp
+    quri
+    uiop
+    usocket-server
+    xml-emitter
+  ];
+
+  asdFilesToKeep = [ "cl-gemini.asd" ];
+}
diff --git a/packages/lisp/default.nix b/packages/lisp/default.nix
index 2397ce9..999ec60 100644
--- a/packages/lisp/default.nix
+++ b/packages/lisp/default.nix
@@ -1,14 +1,17 @@
-{ pkgs, lib, ... }:
+{ pkgs, localLispPackages, ... }:
 
 rec {
-  arrows  = import ./arrows.nix { inherit pkgs; };
-  cl-sasl = import ./cl-sasl.nix { inherit pkgs; };
-  cl-xmpp = import ./cl-xmpp.nix { inherit pkgs cl-sasl; };
-  backplane-dns = import ./backplane-dns.nix {
-    inherit pkgs arrows backplane-server ip-utils;
-  };
-  backplane-server = import ./backplane-server.nix {
-    inherit pkgs lib arrows cl-xmpp;
-  };
-  ip-utils = import ./ip-utils.nix { inherit pkgs; };
+  arrows  = import ./arrows.nix { inherit pkgs localLispPackages; };
+  cl-gemini = import ./cl-gemini.nix { inherit pkgs localLispPackages; };
+  cl-sasl = import ./cl-sasl.nix { inherit pkgs localLispPackages; };
+  cl-xmpp = import ./cl-xmpp.nix { inherit pkgs localLispPackages; };
+  backplane-dns = import ./backplane-dns.nix { inherit pkgs localLispPackages; };
+  backplane-server = import ./backplane-server.nix { inherit pkgs localLispPackages; };
+  fare-mop = import ./fare-mop.nix { inherit pkgs localLispPackages; };
+  file-types = import ./file-types.nix { inherit pkgs localLispPackages; };
+  inferior-shell = import ./inferior-shell.nix { inherit pkgs localLispPackages; };
+  ip-utils = import ./ip-utils.nix { inherit pkgs localLispPackages; };
+  osicat = import ./osicat.nix { inherit pkgs localLispPackages; };
+  usocket-server = import ./usocket-server.nix { inherit pkgs localLispPackages; };
+  xml-emitter = import ./xml-emitter.nix { inherit pkgs localLispPackages; };
 }
diff --git a/packages/lisp/fare-mop.nix b/packages/lisp/fare-mop.nix
new file mode 100644
index 0000000..7e552ad
--- /dev/null
+++ b/packages/lisp/fare-mop.nix
@@ -0,0 +1,23 @@
+{ pkgs, localLispPackages, ... }:
+
+pkgs.lispPackages.buildLispPackage {
+  baseName = "fare-mop";
+  packageName = "fare-mop";
+  description = "fare-mop has a few simple utilities relying on the MOP.";
+
+  buildSystems = [ "fare-mop" ];
+
+  deps = with localLispPackages; [
+    closer-mop
+    fare-utils
+  ];
+
+  src = pkgs.fetchgit {
+    url    = "https://github.com/fare/fare-mop.git";
+    rev    = "538aa94590a0354f382eddd9238934763434af30";
+    sha256 = "0maxs8392953fhnaa6zwnm2mdbhxjxipp4g4rvypm06ixr6pyv1c";
+    fetchSubmodules = false;
+  };
+
+  asdFilesToKeep = [ "fare-mop.asd" ];
+}
diff --git a/packages/lisp/file-types.nix b/packages/lisp/file-types.nix
new file mode 100644
index 0000000..fdf1dbf
--- /dev/null
+++ b/packages/lisp/file-types.nix
@@ -0,0 +1,20 @@
+{ pkgs, ... }:
+
+pkgs.lispPackages.buildLispPackage {
+  baseName = "file-types";
+  packageName = "file-types";
+  description = "Simple scheme to classify file types in a hierarchical fashion. Includes support for associating and querying MIME types.";
+
+  buildSystems = [ "file-types" ];
+
+  deps = [];
+
+  src = pkgs.fetchgit {
+    url    = "https://github.com/eugeneia/file-types.git";
+    rev    = "6f5676b2781f617b6009ae4ce001496ea43b6fac";
+    sha256 = "09l67gzjwx7kx237grm709dsj9rkmmm8s3ya6irmcw8nh587inbs";
+    fetchSubmodules = false;
+  };
+
+  asdFilesToKeep = [ "file-types.asd" ];
+}
diff --git a/packages/lisp/inferior-shell.nix b/packages/lisp/inferior-shell.nix
new file mode 100644
index 0000000..3ca617f
--- /dev/null
+++ b/packages/lisp/inferior-shell.nix
@@ -0,0 +1,28 @@
+{ pkgs, localLispPackages, ... }:
+
+pkgs.lispPackages.buildLispPackage {
+  baseName = "inferior-shell";
+  packageName = "inferior-shell";
+  description = "This CL library allows you to spawn local or remote processes and shell pipes.";
+
+  buildSystems = [ "inferior-shell" ];
+
+  deps = with localLispPackages; [
+    pkgs.asdf
+    alexandria
+    fare-mop
+    fare-quasiquote-extras
+    fare-utils
+    trivia
+    trivia_dot_quasiquote
+  ];
+
+  src = pkgs.fetchgit {
+    url    = "https://github.com/fare/inferior-shell.git";
+    rev    = "15c2d04a7398db965ea1c3ba2d49efa7c851f2c2";
+    sha256 = "02qx37zzk5j4xmwh77k2qa2wvnzvaj6qml5dh2q7b6b1ljvgcj4m";
+    fetchSubmodules = false;
+  };
+
+  asdFilesToKeep = [ "inferior-shell.asd" ];
+}
diff --git a/packages/lisp/osicat.nix b/packages/lisp/osicat.nix
new file mode 100644
index 0000000..5f298a8
--- /dev/null
+++ b/packages/lisp/osicat.nix
@@ -0,0 +1,24 @@
+{ pkgs, localLispPackages, ... }:
+
+pkgs.lispPackages.buildLispPackage {
+  baseName = "osicat";
+  packageName = "osicat";
+  description = "Osicat is a lightweight operating system interface for Common Lisp on Unix-platforms.";
+
+  buildSystems = [ "osicat" ];
+
+  deps = with localLispPackages; [
+    alexandria
+    cffi-grovel
+    trivial-features
+  ];
+
+  src = pkgs.fetchgit {
+    url    = "https://github.com/osicat/osicat.git";
+    rev    = "e635611710fe053b4bbb7e8cc950a524f6061562";
+    sha256 = "1lib65qkwkywmnkgnnbqvfypv82rds7cdaygjmi32d337f82ljzg";
+    fetchSubmodules = false;
+  };
+
+  asdFilesToKeep = [ "osicat.asd" ];
+}
diff --git a/packages/lisp/usocket-server.nix b/packages/lisp/usocket-server.nix
new file mode 100644
index 0000000..9ff3e46
--- /dev/null
+++ b/packages/lisp/usocket-server.nix
@@ -0,0 +1,23 @@
+{ pkgs, localLispPackages, ... }:
+
+pkgs.lispPackages.buildLispPackage {
+  baseName = "usocket-server";
+  packageName = "usocket-server";
+  description = "This is the usocket Common Lisp sockets library: a library to bring sockets access to the broadest of common lisp implementations as possible.";
+
+  buildSystems = [ "usocket" "usocket-server" ];
+
+  deps = with localLispPackages; [
+    bordeaux-threads
+    split-sequence
+  ];
+
+  src = pkgs.fetchgit {
+    url    = "https://github.com/usocket/usocket.git";
+    rev    = "0e2c23192a74bd654b43528f41b62ee69a06b821";
+    sha256 = "18z49j9hdazvy1bf0hc4w4k9iavm1nagfbrbbp8ry1r3y7np6by6";
+    fetchSubmodules = false;
+  };
+
+  asdFilesToKeep = [ "usocket.asd" "usocket-server.asd" ];
+}
diff --git a/packages/lisp/xml-emitter.nix b/packages/lisp/xml-emitter.nix
new file mode 100644
index 0000000..c63f4b4
--- /dev/null
+++ b/packages/lisp/xml-emitter.nix
@@ -0,0 +1,22 @@
+{ pkgs, localLispPackages, ... }:
+
+pkgs.lispPackages.buildLispPackage {
+  baseName = "xml-emitter";
+  packageName = "xml-emitter";
+  description = "Map Lisp to XML.";
+
+  buildSystems = [ "xml-emitter" ];
+
+  deps = with localLispPackages; [
+    cl-utilities
+  ];
+
+  src = pkgs.fetchgit {
+    url    = "https://github.com/VitoVan/xml-emitter.git";
+    rev    = "1a93a5ab084a10f3b527db3043bd0ba5868404bf";
+    sha256 = "1w9yx8gc4imimvjqkhq8yzpg3kjrp2y37rjix5c1lnz4s7bxvhk9";
+    fetchSubmodules = false;
+  };
+
+  asdFilesToKeep = [ "xml-emitter.asd" ];
+}