diff --git a/nixos/modules/system/boot/plymouth.nix b/nixos/modules/system/boot/plymouth.nix
index ef9168999443..2a545e552513 100644
--- a/nixos/modules/system/boot/plymouth.nix
+++ b/nixos/modules/system/boot/plymouth.nix
@@ -4,8 +4,7 @@ with lib;
 
 let
 
-  inherit (pkgs) plymouth;
-  inherit (pkgs) nixos-icons;
+  inherit (pkgs) plymouth nixos-icons;
 
   cfg = config.boot.plymouth;
 
@@ -16,14 +15,37 @@ let
     osVersion = config.system.nixos.release;
   };
 
+  plymouthLogos = pkgs.runCommand "plymouth-logos" { inherit (cfg) logo; } ''
+    mkdir -p $out
+
+    # For themes that are compiled with PLYMOUTH_LOGO_FILE
+    mkdir -p $out/etc/plymouth
+    ln -s $logo $out/etc/plymouth/logo.png
+
+    # Logo for bgrt theme
+    # Note this is technically an abuse of watermark for the bgrt theme
+    # See: https://gitlab.freedesktop.org/plymouth/plymouth/-/issues/95#note_813768
+    mkdir -p $out/share/plymouth/themes/spinner
+    ln -s $logo $out/share/plymouth/themes/spinner/watermark.png
+
+    # Logo for spinfinity theme
+    # See: https://gitlab.freedesktop.org/plymouth/plymouth/-/issues/106
+    mkdir -p $out/share/plymouth/themes/spinfinity
+    ln -s $logo $out/share/plymouth/themes/spinfinity/header-image.png
+  '';
+
   themesEnv = pkgs.buildEnv {
     name = "plymouth-themes";
-    paths = [ plymouth ] ++ cfg.themePackages;
+    paths = [
+      plymouth
+      plymouthLogos
+    ] ++ cfg.themePackages;
   };
 
   configFile = pkgs.writeText "plymouthd.conf" ''
     [Daemon]
     ShowDelay=0
+    DeviceTimeout=8
     Theme=${cfg.theme}
     ${cfg.extraConfig}
   '';
@@ -47,7 +69,7 @@ in
       };
 
       themePackages = mkOption {
-        default = [ nixosBreezePlymouth ];
+        default = lib.optional (cfg.theme == "breeze") nixosBreezePlymouth;
         type = types.listOf types.package;
         description = ''
           Extra theme packages for plymouth.
@@ -55,7 +77,7 @@ in
       };
 
       theme = mkOption {
-        default = "breeze";
+        default = "bgrt";
         type = types.str;
         description = ''
           Splash screen theme.
@@ -64,7 +86,8 @@ in
 
       logo = mkOption {
         type = types.path;
-        default = "${nixos-icons}/share/icons/hicolor/128x128/apps/nix-snowflake.png";
+        # Dimensions are 48x48 to match GDM logo
+        default = "${nixos-icons}/share/icons/hicolor/48x48/apps/nix-snowflake-white.png";
         defaultText = ''pkgs.fetchurl {
           url = "https://nixos.org/logo/nixos-hires.png";
           sha256 = "1ivzgd7iz0i06y36p8m5w48fd8pjqwxhdaavc0pxs7w1g7mcy5si";
@@ -110,12 +133,18 @@ in
     systemd.services.plymouth-poweroff.wantedBy = [ "poweroff.target" ];
     systemd.services.plymouth-reboot.wantedBy = [ "reboot.target" ];
     systemd.services.plymouth-read-write.wantedBy = [ "sysinit.target" ];
-    systemd.services.systemd-ask-password-plymouth.wantedBy = ["multi-user.target"];
-    systemd.paths.systemd-ask-password-plymouth.wantedBy = ["multi-user.target"];
+    systemd.services.systemd-ask-password-plymouth.wantedBy = [ "multi-user.target" ];
+    systemd.paths.systemd-ask-password-plymouth.wantedBy = [ "multi-user.target" ];
 
     boot.initrd.extraUtilsCommands = ''
-      copy_bin_and_libs ${pkgs.plymouth}/bin/plymouthd
-      copy_bin_and_libs ${pkgs.plymouth}/bin/plymouth
+      copy_bin_and_libs ${plymouth}/bin/plymouth
+      copy_bin_and_libs ${plymouth}/bin/plymouthd
+
+      # Check if the actual requested theme is here
+      if [[ ! -d ${themesEnv}/share/plymouth/themes/${cfg.theme} ]]; then
+          echo "The requested theme: ${cfg.theme} is not provided by any of the packages in boot.plymouth.themePackages"
+          exit 1
+      fi
 
       moduleName="$(sed -n 's,ModuleName *= *,,p' ${themesEnv}/share/plymouth/themes/${cfg.theme}/${cfg.theme}.plymouth)"
 
@@ -127,21 +156,29 @@ in
       mkdir -p $out/share/plymouth/themes
       cp ${plymouth}/share/plymouth/plymouthd.defaults $out/share/plymouth
 
-      # copy themes into working directory for patching
+      # Copy themes into working directory for patching
       mkdir themes
-      # use -L to copy the directories proper, not the symlinks to them
-      cp -r -L ${themesEnv}/share/plymouth/themes/{text,details,${cfg.theme}} themes
 
-      # patch out any attempted references to the theme or plymouth's themes directory
+      # Use -L to copy the directories proper, not the symlinks to them.
+      # Copy all themes because they're not large assets, and bgrt depends on the ImageDir of
+      # the spinner theme.
+      cp -r -L ${themesEnv}/share/plymouth/themes/* themes
+
+      # Patch out any attempted references to the theme or plymouth's themes directory
       chmod -R +w themes
       find themes -type f | while read file
       do
         sed -i "s,/nix/.*/share/plymouth/themes,$out/share/plymouth/themes,g" $file
       done
 
+      # Install themes
       cp -r themes/* $out/share/plymouth/themes
-      cp ${cfg.logo} $out/share/plymouth/logo.png
 
+      # Install logo
+      mkdir -p $out/etc/plymouth
+      cp -r -L ${themesEnv}/etc/plymouth $out
+
+      # Setup font
       mkdir -p $out/share/fonts
       cp ${cfg.font} $out/share/fonts
       mkdir -p $out/etc/fonts
diff --git a/pkgs/applications/window-managers/icewm/default.nix b/pkgs/applications/window-managers/icewm/default.nix
index 571c13e94619..8f1a920296ae 100644
--- a/pkgs/applications/window-managers/icewm/default.nix
+++ b/pkgs/applications/window-managers/icewm/default.nix
@@ -1,8 +1,8 @@
-{ lib, stdenv
+{ lib
+, stdenv
 , fetchFromGitHub
 , cmake
 , pkg-config
-, perl
 , asciidoc
 , expat
 , fontconfig
@@ -34,21 +34,26 @@
 , libxcb
 , mkfontdir
 , pcre
+, perl
 }:
 
 stdenv.mkDerivation rec {
   pname = "icewm";
-  version = "2.1.2";
+  version = "2.2.0";
 
   src = fetchFromGitHub {
     owner  = "bbidulock";
     repo = pname;
     rev = version;
-    sha256 = "sha256-n9mLD1WrHsO9W1rxopFQENxQEHp/sxuixV3PxLp2vOY=";
+    hash = "sha256-STM8t311lf0xIqs2Onmwg48xgE7V9VZrUfJrUzYRxL4=";
   };
 
-  nativeBuildInputs = [ cmake pkg-config perl asciidoc ];
-
+  nativeBuildInputs = [
+    asciidoc
+    cmake
+    perl
+    pkg-config
+  ];
   buildInputs = [
     expat
     fontconfig
@@ -90,6 +95,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
+    homepage = "https://www.ice-wm.org/";
     description = "A simple, lightweight X window manager";
     longDescription = ''
       IceWM is a window manager for the X Window System. The goal of IceWM is
@@ -104,8 +110,7 @@ stdenv.mkDerivation rec {
       includes an optional external background wallpaper manager with
       transparency support, a simple session manager and a system tray.
     '';
-    homepage = "https://www.ice-wm.org/";
-    license = licenses.lgpl2;
+    license = licenses.lgpl2Only;
     maintainers = [ maintainers.AndersonTorres ];
     platforms = platforms.linux;
   };
diff --git a/pkgs/applications/window-managers/sawfish/default.nix b/pkgs/applications/window-managers/sawfish/default.nix
index 7615c6c4bd80..cb76f0c465cc 100644
--- a/pkgs/applications/window-managers/sawfish/default.nix
+++ b/pkgs/applications/window-managers/sawfish/default.nix
@@ -1,20 +1,23 @@
-{ lib, stdenv
+{ lib
+, stdenv
 , fetchurl
-, pkg-config
-, which
 , autoreconfHook
-, rep-gtk
-, pango
 , gdk-pixbuf-xlib
-, imlib
 , gettext
-, texinfo
+, gtk2
+, imlib
+, libICE
+, libSM
 , libXinerama
 , libXrandr
 , libXtst
-, libICE
-, libSM
+, librep
 , makeWrapper
+, pango
+, pkg-config
+, rep-gtk
+, texinfo
+, which
 }:
 
 stdenv.mkDerivation rec {
@@ -26,20 +29,42 @@ stdenv.mkDerivation rec {
     sha256 = "18p8srqqj9vjffg13qhspfz2gr1h4vfs10qzlv89g76r289iam31";
   };
 
-  nativeBuildInputs = [ autoreconfHook pkg-config ];
-  buildInputs = [ which
-    rep-gtk pango gdk-pixbuf-xlib imlib gettext texinfo
-    libXinerama libXrandr libXtst libICE libSM
-    makeWrapper ];
+  nativeBuildInputs = [
+    autoreconfHook
+    gettext
+    librep
+    makeWrapper
+    pkg-config
+    texinfo
+    which
+  ];
+  buildInputs = [
+    gdk-pixbuf-xlib
+    gtk2
+    imlib
+    libICE
+    libSM
+    libXinerama
+    libXrandr
+    libXtst
+    librep
+    pango
+    rep-gtk
+  ];
 
-  patchPhase = ''
+  postPatch = ''
     sed -e 's|REP_DL_LOAD_PATH=|REP_DL_LOAD_PATH=$(REP_DL_LOAD_PATH):|g' -i Makedefs.in
     sed -e 's|$(repexecdir)|$(libdir)/rep|g' -i src/Makefile.in
   '';
 
+  strictDeps = true;
+
   postInstall = ''
-    for i in $out/lib/sawfish/sawfish-menu $out/bin/sawfish-about \
-             $out/bin/sawfish-client $out/bin/sawfish-config $out/bin/sawfish; do
+    for i in $out/lib/sawfish/sawfish-menu \
+             $out/bin/sawfish-about \
+             $out/bin/sawfish-client \
+             $out/bin/sawfish-config \
+             $out/bin/sawfish; do
       wrapProgram $i \
         --prefix REP_DL_LOAD_PATH : "$out/lib/rep" \
         --set REP_LOAD_PATH "$out/share/sawfish/lisp"
@@ -47,16 +72,17 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
+    homepage = "http://sawfish.tuxfamily.org/";
     description = "An extensible, Lisp-based window manager";
     longDescription = ''
-      Sawfish is an extensible window manager using a Lisp-based scripting language.
-      Its policy is very minimal compared to most window managers. Its aim is simply
-      to manage windows in the most flexible and attractive manner possible.
-      All high-level WM functions are implemented in Lisp for future extensibility
-      or redefinition.
+      Sawfish is an extensible window manager using a Lisp-based scripting
+      language. Its policy is very minimal compared to most window managers. Its
+      aim is simply to manage windows in the most flexible and attractive manner
+      possible. All high-level WM functions are implemented in Lisp for future
+      extensibility or redefinition.
     '';
-    homepage = "https://sawfish.fandom.com/wiki/Main_Page";
-    license = licenses.gpl2;
-    maintainers = [ maintainers.AndersonTorres ];
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ AndersonTorres ];
+    platforms = platforms.unix;
   };
 }
diff --git a/pkgs/development/libraries/librep/default.nix b/pkgs/development/libraries/librep/default.nix
index 74c45f00adcf..cd007c5fe57a 100644
--- a/pkgs/development/libraries/librep/default.nix
+++ b/pkgs/development/libraries/librep/default.nix
@@ -1,37 +1,49 @@
-{ lib, stdenv, fetchurl
-, pkg-config, autoreconfHook
-, readline, texinfo
-, gdbm, gmp, libffi }:
-
-with lib;
+{ lib
+, stdenv
+, fetchurl
+, autoreconfHook
+, gdbm
+, gmp
+, libffi
+, pkg-config
+, readline
+, texinfo
+}:
 
 stdenv.mkDerivation rec {
   pname = "librep";
   version = "0.92.7";
-  sourceName = "librep_${version}";
 
   src = fetchurl {
-    url = "https://download.tuxfamily.org/librep/${sourceName}.tar.xz";
+    url = "https://download.tuxfamily.org/${pname}/${pname}_${version}.tar.xz";
     sha256 = "1bmcjl1x1rdh514q9z3hzyjmjmwwwkziipjpjsl301bwmiwrd8a8";
   };
 
-  nativeBuildInputs = [ autoreconfHook pkg-config ];
-  buildInputs = [ readline texinfo ];
-  propagatedBuildInputs = [ gdbm gmp libffi ];
+  nativeBuildInputs = [
+    autoreconfHook
+    pkg-config
+    texinfo
+  ];
+  buildInputs = [
+    gdbm
+    gmp
+    libffi
+    readline
+  ];
 
   setupHook = ./setup-hook.sh;
 
-  meta = {
+  meta = with lib;{
+    homepage = "http://sawfish.tuxfamily.org/";
     description = "Fast, lightweight, and versatile Lisp environment";
     longDescription = ''
-      librep is a Lisp system for UNIX, comprising an
-      interpreter, a byte-code compiler, and a virtual
-      machine. It can serve as an application extension language
-      but is also suitable for standalone scripts.
-     '';
-    homepage = "http://sawfish.wikia.com";
-    license = licenses.gpl2;
+      librep is a Lisp system for UNIX, comprising an interpreter, a byte-code
+      compiler, and a virtual machine. It can serve as an application extension
+      language but is also suitable for standalone scripts.
+    '';
+    license = licenses.gpl2Plus;
     maintainers = [ maintainers.AndersonTorres ];
+    platforms = platforms.unix;
   };
 }
 # TODO: investigate fetchFromGithub
diff --git a/pkgs/development/libraries/rep-gtk/default.nix b/pkgs/development/libraries/rep-gtk/default.nix
index 618c91421b6a..433da05d088f 100644
--- a/pkgs/development/libraries/rep-gtk/default.nix
+++ b/pkgs/development/libraries/rep-gtk/default.nix
@@ -1,30 +1,40 @@
-{ lib, stdenv, fetchurl, pkg-config, autoreconfHook, librep, gtk2 }:
+{ lib
+, stdenv
+, fetchurl
+, autoreconfHook
+, gtk2
+, librep
+, pkg-config
+}:
 
-with lib;
 stdenv.mkDerivation rec {
-
   pname = "rep-gtk";
   version = "0.90.8.3";
-  sourceName = "rep-gtk_${version}";
 
   src = fetchurl {
-    url = "https://download.tuxfamily.org/librep/rep-gtk/${sourceName}.tar.xz";
+    url = "https://download.tuxfamily.org/librep/${pname}/${pname}_${version}.tar.xz";
     sha256 = "0hgkkywm8zczir3lqr727bn7ybgg71x9cwj1av8fykkr8pdpard9";
   };
 
-  nativeBuildInputs = [ autoreconfHook pkg-config ];
-  buildInputs = [ ];
-  propagatedBuildInputs = [ librep gtk2 ];
+  nativeBuildInputs = [
+    autoreconfHook
+    pkg-config
+  ];
+  buildInputs = [
+    gtk2
+    librep
+  ];
 
   patchPhase = ''
     sed -e 's|installdir=$(repexecdir)|installdir=$(libdir)/rep|g' -i Makefile.in
   '';
 
-  meta = {
+  meta = with lib; {
+    homepage = "http://sawfish.tuxfamily.org";
     description = "GTK bindings for librep";
-    homepage = "http://sawfish.wikia.com";
-    license = licenses.gpl2;
+    license = licenses.gpl2Plus;
     maintainers = [ maintainers.AndersonTorres ];
+    platforms = platforms.unix;
   };
 }
 # TODO: investigate fetchFromGithub
diff --git a/pkgs/development/python-modules/faadelays/default.nix b/pkgs/development/python-modules/faadelays/default.nix
new file mode 100644
index 000000000000..3175aabcae84
--- /dev/null
+++ b/pkgs/development/python-modules/faadelays/default.nix
@@ -0,0 +1,30 @@
+{ lib
+, aiohttp
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "faadelays";
+  version = "0.0.6";
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "02z8p0n9d6n4l6v1m969009gxwmy5v14z108r4f3swd6yrk0h2xd";
+  };
+
+  propagatedBuildInputs = [ aiohttp ];
+
+  # Project has no tests
+  doCheck = false;
+  pythonImportsCheck = [ "faadelays" ];
+
+  meta = with lib; {
+    description = "Python package to retrieve FAA airport status";
+    homepage = "https://github.com/ntilley905/faadelays";
+    license = licenses.mit;
+    maintainers = with maintainers; [ fab ];
+  };
+}
diff --git a/pkgs/development/python-modules/pymazda/default.nix b/pkgs/development/python-modules/pymazda/default.nix
new file mode 100644
index 000000000000..145b405922d8
--- /dev/null
+++ b/pkgs/development/python-modules/pymazda/default.nix
@@ -0,0 +1,31 @@
+{ lib
+, aiohttp
+, buildPythonPackage
+, fetchPypi
+, pycryptodome
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "pymazda";
+  version = "0.0.9";
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "15kygabjlxmy3g5kj48ixqdwaz8qrfzxj8ii27cidsp2fq8ph165";
+  };
+
+  propagatedBuildInputs = [ aiohttp pycryptodome ];
+
+  # Project has no tests
+  doCheck = false;
+  pythonImportsCheck = [ "pymazda" ];
+
+  meta = with lib; {
+    description = "Python client for interacting with the MyMazda API";
+    homepage = "https://github.com/bdr99/pymazda";
+    license = licenses.mit;
+    maintainers = with maintainers; [ fab ];
+  };
+}
diff --git a/pkgs/development/python-modules/python-smarttub/default.nix b/pkgs/development/python-modules/python-smarttub/default.nix
new file mode 100644
index 000000000000..3e5889b93560
--- /dev/null
+++ b/pkgs/development/python-modules/python-smarttub/default.nix
@@ -0,0 +1,47 @@
+{ lib
+, aiohttp
+, aresponses
+, buildPythonPackage
+, fetchFromGitHub
+, inflection
+, pyjwt
+, pytest-asyncio
+, pytestCheckHook
+, python-dateutil
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "python-smarttub";
+  version = "0.0.19";
+  disabled = pythonOlder "3.8";
+
+  src = fetchFromGitHub {
+    owner = "mdz";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "01i4pvgvpl7inwhy53c6b34pi5zvfiv2scn507j8jdg5cjs04g80";
+  };
+
+  propagatedBuildInputs = [
+    aiohttp
+    inflection
+    pyjwt
+    python-dateutil
+  ];
+
+  checkInputs = [
+    aresponses
+    pytest-asyncio
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [ "smarttub" ];
+
+  meta = with lib; {
+    description = "Python API for SmartTub enabled hot tubs";
+    homepage = "https://github.com/mdz/python-smarttub";
+    license = with licenses; [ mit ];
+    maintainers = with maintainers; [ fab ];
+  };
+}
diff --git a/pkgs/development/tools/electron/default.nix b/pkgs/development/tools/electron/default.nix
index 6ea866eb8f5c..e0792fbc36ba 100644
--- a/pkgs/development/tools/electron/default.nix
+++ b/pkgs/development/tools/electron/default.nix
@@ -14,6 +14,7 @@
 , mesa
 , libxkbcommon
 , libappindicator-gtk3
+, libxshmfence
 }@args:
 
 let
@@ -21,7 +22,7 @@ let
 in
 rec {
 
-  electron = electron_11;
+  electron = electron_12;
 
   electron_3 = mkElectron "3.1.13" {
     x86_64-linux = "1psmbplz6jhnnf6hmfhxbmmhn4n1dpnhzbc12pxn645xhfpk9ark";
@@ -76,13 +77,13 @@ rec {
     headers = "18frb1z5qkyff5z1w44mf4iz9aw9j4lq0h9yxgfnp33zf7sl9qb5";
   };
 
-  electron_9 = mkElectron "9.4.3" {
-    x86_64-linux = "7744ec8af6512e569d600d7fd8e9105d3ca5ac7b6f54390dd553edbd7816289f";
-    x86_64-darwin = "68c67a32f149618d629eb4a8a8044b98dc6ceedc16d46ff20782fcccad72fc44";
-    i686-linux = "904955ee8365b95439fb4643844ac868b59525ed230a76c8e0395c0aa5719813";
-    armv7l-linux = "5cfb3ae97a75d33d4b102d75944610dd56a566ee98186a030eb5bdbbd3d76323";
-    aarch64-linux = "8afa647e4b5b1e290d5d852c7420e82916ba740e3e5576599076dc139cd1d556";
-    headers = "0712160j1yvl9fmj2vm9lznkwnmji1hjzyicb4vis52lbrwx820l";
+  electron_9 = mkElectron "9.4.4" {
+    x86_64-linux = "781d6ca834d415c71078e1c2c198faba926d6fce19e31448bbf4450869135450";
+    x86_64-darwin = "f41c0bf874ddbba00c3d6989d07f74155a236e2d5a3eaf3d1d19ef8d3eb2256c";
+    i686-linux = "40e37f8f908a81c9fac1073fe22309cd6df2d68e685f83274c6d2f0959004187";
+    armv7l-linux = "2dfe3e21d30526688cc3d3215d06dfddca597a2cb62ff0c9d0d5f33d3e464a33";
+    aarch64-linux = "f1145e9a1feb5f2955e5f5565962423ac3c52ffe45ccc3b96c6ca485fa35bf27";
+    headers = "0yx8mkrm15ha977hzh7g2sc5fab9sdvlk1bk3yxignhxrqqbw885";
   };
 
   electron_10 = mkElectron "10.4.0" {
@@ -102,4 +103,13 @@ rec {
     aarch64-linux = "fad31c6fba7aba54db19a2aaedb03b514c51dd58bf301afab5265126833feb15";
     headers = "123g3dgsb4vp8w1bm4apbp973ppzx4i4y35lhhmqjbp51jhrm9f0";
   };
+
+  electron_12 = mkElectron "12.0.0" {
+    x86_64-linux = "d132a80e08500e783e36a25cb72bc2555ec388798326c22348e3d9ff57fa91f1";
+    x86_64-darwin = "18546dec0ecc63d1a679762e00bc85fbb820e08f7ca205924681379bb0a7afc2";
+    i686-linux = "79651836e857f8c860c6ad053346f7e2cf38351160845687b199faba113b9483";
+    armv7l-linux = "e98eb2df69f240806e283018d4e0349a45b4cb5b6635d1e1c11d869e50cc60cb";
+    aarch64-linux = "ea26777ffea5e788bb708814c8707e8ac3529146e7738729aa8bd49d0d74bcd1";
+    headers = "0h7mkz7wmcf0jq8gmq21ag2ax5ivy2wlz0ykw7rv2r4l5686xdjr";
+  };
 }
diff --git a/pkgs/development/tools/electron/generic.nix b/pkgs/development/tools/electron/generic.nix
index e29064e673ad..c60ab738aa45 100644
--- a/pkgs/development/tools/electron/generic.nix
+++ b/pkgs/development/tools/electron/generic.nix
@@ -14,6 +14,7 @@
 , mesa
 , libxkbcommon
 , libappindicator-gtk3
+, libxshmfence
 }:
 
 version: hashes:
@@ -60,6 +61,7 @@ let
     [ libuuid at-spi2-atk at-spi2-core libappindicator-gtk3 ]
     ++ optionals (! versionOlder version "9.0.0") [ libdrm mesa ]
     ++ optionals (! versionOlder version "11.0.0") [ libxkbcommon ]
+    ++ optionals (! versionOlder version "12.0.0") [ libxshmfence ]
   );
 
   linux = {
diff --git a/pkgs/os-specific/linux/plymouth/default.nix b/pkgs/os-specific/linux/plymouth/default.nix
index c167b202c8d6..8cb2a00987e1 100644
--- a/pkgs/os-specific/linux/plymouth/default.nix
+++ b/pkgs/os-specific/linux/plymouth/default.nix
@@ -1,64 +1,111 @@
-{ stdenv, fetchurl, autoreconfHook, pkg-config, libxslt, docbook_xsl
-, gtk3, udev, systemd, lib
+{ lib
+, stdenv
+, fetchpatch
+, fetchFromGitLab
+, pkg-config
+, autoreconfHook
+, libxslt
+, docbook-xsl-nons
+, gettext
+, gtk3
+, systemd
+, pango
+, cairo
+, libdrm
 }:
 
 stdenv.mkDerivation rec {
-  pname = "plymouth";
-  version = "0.9.4";
+  pname = "plymouth-unstable";
+  version = "2020-12-07";
 
-  src = fetchurl {
-    url = "https://www.freedesktop.org/software/plymouth/releases/${pname}-${version}.tar.xz";
-    sha256 = "0l8kg7b2vfxgz9gnrn0v2w4jvysj2cirp0nxads5sy05397pl6aa";
+  outputs = [
+    "out"
+    "dev"
+  ];
+
+  src = fetchFromGitLab {
+    domain = "gitlab.freedesktop.org";
+    owner = "plymouth";
+    repo = "plymouth";
+    rev = "c4ced2a2d70edea7fbb95274aa1d01d95928df1b";
+    sha256 = "7CPuKMA0fTt8DBsaA4Td74kHT/O7PW8N3awP04nUnOI=";
   };
 
   nativeBuildInputs = [
-    autoreconfHook pkg-config libxslt docbook_xsl
+    autoreconfHook
+    docbook-xsl-nons
+    gettext
+    libxslt
+    pkg-config
   ];
 
   buildInputs = [
-    gtk3 udev systemd
+    cairo
+    gtk3
+    libdrm
+    pango
+    systemd
+  ];
+
+  patches = [
+    # KillMode=none is deprecated
+    # https://gitlab.freedesktop.org/plymouth/plymouth/-/issues/123
+    (fetchpatch {
+      url = "https://gitlab.freedesktop.org/plymouth/plymouth/-/commit/b406b0895a95949db2adfedaeda451f36f2b51c3.patch";
+      sha256 = "/UBImNuFO0G/oxlttjGIXon8YXMXlc9XU8uVuR9QuxY=";
+    })
   ];
 
   postPatch = ''
     sed -i \
-      -e "s#\$(\$PKG_CONFIG --variable=systemdsystemunitdir systemd)#$out/etc/systemd/system#g" \
       -e "s#plymouthplugindir=.*#plymouthplugindir=/etc/plymouth/plugins/#" \
       -e "s#plymouththemedir=.*#plymouththemedir=/etc/plymouth/themes#" \
       -e "s#plymouthpolicydir=.*#plymouthpolicydir=/etc/plymouth/#" \
+      -e "s#plymouthconfdir=.*#plymouthconfdir=/etc/plymouth/#" \
       configure.ac
   '';
 
+  configurePlatforms = [ "host" ];
+
   configureFlags = [
-    "--sysconfdir=/etc"
-    "--with-systemdunitdir=${placeholder "out"}/etc/systemd/system"
-    "--localstatedir=/var"
-    "--with-logo=/etc/plymouth/logo.png"
-    "--with-background-color=0x000000"
-    "--with-background-start-color-stop=0x000000"
-    "--with-background-end-color-stop=0x000000"
-    "--with-release-file=/etc/os-release"
-    "--without-system-root-install"
-    "--without-rhgb-compat-link"
-    "--enable-tracing"
-    "--enable-systemd-integration"
-    "--enable-pango"
-    "--enable-gdm-transition"
+    "--enable-documentation"
+    "--enable-drm"
     "--enable-gtk"
+    "--enable-pango"
+    "--enable-systemd-integration"
+    "--enable-tracing"
+    "--localstatedir=/var"
+    "--sysconfdir=/etc"
+    "--with-background-color=0x000000"
+    "--with-background-end-color-stop=0x000000"
+    "--with-background-start-color-stop=0x000000"
+    "--with-logo=/etc/plymouth/logo.png"
+    "--with-release-file=/etc/os-release"
+    "--with-runtimedir=/run"
+    "--with-systemdunitdir=${placeholder "out"}/etc/systemd/system"
+    "--without-rhgb-compat-link"
+    "--without-system-root-install"
     "ac_cv_path_SYSTEMD_ASK_PASSWORD_AGENT=${lib.getBin systemd}/bin/systemd-tty-ask-password-agent"
   ];
 
-  configurePlatforms = [ "host" ];
-
   installFlags = [
-    "plymouthd_defaultsdir=$(out)/share/plymouth"
-    "plymouthd_confdir=$(out)/etc/plymouth"
+    "localstatedir=\${TMPDIR}"
+    "plymouthd_confdir=${placeholder "out"}/etc/plymouth"
+    "plymouthd_defaultsdir=${placeholder "out"}/share/plymouth"
+    "sysconfdir=${placeholder "out"}/etc"
   ];
 
+  postInstall = ''
+    # Makes a symlink to /usr/share/pixmaps/system-logo-white.png
+    # We'll handle it in the nixos module.
+    rm $out/share/plymouth/themes/spinfinity/header-image.png
+  '';
+
   meta = with lib; {
-    homepage = "http://www.freedesktop.org/wiki/Software/Plymouth";
-    description = "A graphical boot animation";
-    license = licenses.gpl2;
-    maintainers = [ maintainers.goibhniu ];
+    homepage = "https://www.freedesktop.org/wiki/Software/Plymouth/";
+    description = "Boot splash and boot logger";
+    license = licenses.gpl2Plus;
+    maintainers = [ maintainers.goibhniu teams.gnome.members ];
     platforms = platforms.linux;
   };
 }
diff --git a/pkgs/tools/text/zstxtns-utils/default.nix b/pkgs/tools/text/zstxtns-utils/default.nix
new file mode 100644
index 000000000000..839a54933742
--- /dev/null
+++ b/pkgs/tools/text/zstxtns-utils/default.nix
@@ -0,0 +1,41 @@
+{ bash
+, coreutils
+, fetchurl
+, gnugrep
+, lib
+, makeWrapper
+, moreutils
+, stdenv
+}:
+
+stdenv.mkDerivation rec {
+  pname = "zstxtns-utils";
+  version = "0.0.3";
+
+  src = fetchurl {
+    url = "https://ytrizja.de/distfiles/zstxtns-utils-${version}.tar.gz";
+    sha256 = "I/Gm7vHUr29NClYWQ1kwu8HrNZpdLXfE/nutTNoqcdU=";
+  };
+
+  nativeBuildInputs = [ makeWrapper ];
+  buildInputs = [ bash coreutils gnugrep moreutils ];
+
+  installPhase = ''
+    runHook preInstall
+    install -D -t $out/bin zstxtns-merge zstxtns-unmerge
+    runHook postInstall
+  '';
+
+  postInstall = ''
+    wrapProgram $out/bin/zstxtns-merge --prefix PATH ":" "${lib.makeBinPath [coreutils gnugrep moreutils]}"
+    wrapProgram $out/bin/zstxtns-unmerge --prefix PATH ":" "${lib.makeBinPath [coreutils gnugrep]}"
+  '';
+
+  meta = with lib; {
+    description = "utilities to deal with text based name service databases";
+    homepage = "https://ytrizja.de/";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ zseri ];
+    platforms = platforms.all;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 9b9a68dbb134..97a0e998a24a 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9393,6 +9393,8 @@ in
 
   zs-apc-spdu-ctl = callPackage ../tools/networking/zs-apc-spdu-ctl { };
 
+  zstxtns-utils = callPackage ../tools/text/zstxtns-utils { };
+
   zsh-autoenv = callPackage ../tools/misc/zsh-autoenv { };
 
   zsh-autopair = callPackage ../shells/zsh/zsh-autopair { };
@@ -11850,7 +11852,7 @@ in
   aws-adfs = with python3Packages; toPythonApplication aws-adfs;
 
   inherit (callPackages ../development/tools/electron { })
-    electron electron_3 electron_4 electron_5 electron_6 electron_7 electron_8 electron_9 electron_10 electron_11;
+    electron electron_3 electron_4 electron_5 electron_6 electron_7 electron_8 electron_9 electron_10 electron_11 electron_12;
 
   autobuild = callPackage ../development/tools/misc/autobuild { };
 
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index d937a8bf7e48..e81958726a45 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2173,6 +2173,8 @@ in {
 
   Fabric = callPackage ../development/python-modules/Fabric { };
 
+  faadelays = callPackage ../development/python-modules/faadelays { };
+
   fabulous = callPackage ../development/python-modules/fabulous { };
 
   facebook-sdk = callPackage ../development/python-modules/facebook-sdk { };
@@ -5722,6 +5724,8 @@ in {
 
   pymavlink = callPackage ../development/python-modules/pymavlink { };
 
+  pymazda = callPackage ../development/python-modules/pymazda { };
+
   pymbolic = callPackage ../development/python-modules/pymbolic { };
 
   pymc3 = callPackage ../development/python-modules/pymc3 { };
@@ -6523,6 +6527,8 @@ in {
 
   python-slugify = callPackage ../development/python-modules/python-slugify { };
 
+  python-smarttub = callPackage ../development/python-modules/python-smarttub { };
+
   python-snap7 = callPackage ../development/python-modules/python-snap7 {
     inherit (pkgs) snap7;
   };