diff --git a/pkgs/desktops/mate/atril/default.nix b/pkgs/desktops/mate/atril/default.nix
index 05b9d966fc43..57f721f49a28 100644
--- a/pkgs/desktops/mate/atril/default.nix
+++ b/pkgs/desktops/mate/atril/default.nix
@@ -1,12 +1,12 @@
-{ stdenv, fetchurl, pkgconfig, intltool, gtk3, libxml2, libsecret, poppler, itstool, hicolor-icon-theme, mate, wrapGAppsHook }:
+{ stdenv, fetchurl, pkgconfig, intltool, gtk3, glib, libxml2, libsecret, poppler, itstool, hicolor-icon-theme, mate, wrapGAppsHook }:
 
 stdenv.mkDerivation rec {
   name = "atril-${version}";
-  version = "1.20.0";
+  version = "1.20.3";
 
   src = fetchurl {
     url = "https://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "1639jxcdhcn5wvb4gj9xncdj5d5c3rnyydwwsgqj66cmfmb53l1n";
+    sha256 = "00vrqyfk370fdhlfv3m6n0l6hnx30hrsrcg1xja03957cgvcvnvr";
   };
 
   nativeBuildInputs = [
@@ -17,6 +17,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     gtk3
+    glib
     itstool
     libsecret
     libxml2
@@ -25,7 +26,9 @@ stdenv.mkDerivation rec {
     mate.mate-desktop
     hicolor-icon-theme
   ];
-  
+
+  NIX_CFLAGS_COMPILE = "-I${glib.dev}/include/gio-unix-2.0";
+
   makeFlags = [ "cajaextensiondir=$$out/lib/caja/extensions-2.0" ];
 
   meta = {
diff --git a/pkgs/desktops/mate/caja-extensions/default.nix b/pkgs/desktops/mate/caja-extensions/default.nix
index cd47f7b62b4f..64ef0cb57f27 100644
--- a/pkgs/desktops/mate/caja-extensions/default.nix
+++ b/pkgs/desktops/mate/caja-extensions/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "caja-extensions-${version}";
-  version = "1.20.1";
+  version = "1.20.2";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "01k7c3gw6rfd7vlch61zig22bvz40wlnalc5p3rz4d9i98fr643n";
+    sha256 = "14w1xd33ggn6wdzqvcmj8rqc68w4k094lai6mqrgmv1zljifydqz";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/caja/default.nix b/pkgs/desktops/mate/caja/default.nix
index 63ad4e671254..130d44d6a1a1 100644
--- a/pkgs/desktops/mate/caja/default.nix
+++ b/pkgs/desktops/mate/caja/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "caja-${version}";
-  version = "1.21.2";
+  version = "1.20.3";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "0kswpghpsz69l417ammniy1ja0dsg1hrsm2k0rx28q9mhdfdmnwq";
+    sha256 = "1wlrhcvhqving3pphbz50xnbp7z57mlkf7m36lfh8mim62kfmmd0";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/engrampa/default.nix b/pkgs/desktops/mate/engrampa/default.nix
index 2becc40a46c3..1989ac8e12cc 100644
--- a/pkgs/desktops/mate/engrampa/default.nix
+++ b/pkgs/desktops/mate/engrampa/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "engrampa-${version}";
-  version = "1.21.0";
+  version = "1.20.2";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "0y79rzmv3i03la443bp8f6gsgm03vr4nd88npwrvjqlxs59lg1gw";
+    sha256 = "0fj957dfagw6p7mq5545h9j2w3hv18yqnkpypnr719r4g13d3f2v";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/eom/default.nix b/pkgs/desktops/mate/eom/default.nix
index 4f3380514494..3b830f73c76a 100644
--- a/pkgs/desktops/mate/eom/default.nix
+++ b/pkgs/desktops/mate/eom/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "eom-${version}";
-  version = "1.21.2";
+  version = "1.20.2";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "08idw219mw0v0nkaphy0jvxi67gqm4nzbbnhnwjksxbma2gmpvss";
+    sha256 = "0440sfbidizn860w5avgwld08qc2fslrm0nx2659651cf3r7rw05";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/libmatekbd/default.nix b/pkgs/desktops/mate/libmatekbd/default.nix
index 842ab5b214da..15b81a628863 100644
--- a/pkgs/desktops/mate/libmatekbd/default.nix
+++ b/pkgs/desktops/mate/libmatekbd/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "libmatekbd-${version}";
-  version = "1.21.0";
+  version = "1.20.2";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "0xi5ds2psbf0qb0363ljxz5m9xxh1hr2hcn8zv6ni6mdqsqnkajz";
+    sha256 = "1l1zbphs4snswf4bkrwkk6gsmb44bdhymcfgaaspzbrcmw3y7hr1";
   };
 
   nativeBuildInputs = [ pkgconfig intltool ];
diff --git a/pkgs/desktops/mate/libmatemixer/default.nix b/pkgs/desktops/mate/libmatemixer/default.nix
index dab73ed34991..8bf0d9bec18c 100644
--- a/pkgs/desktops/mate/libmatemixer/default.nix
+++ b/pkgs/desktops/mate/libmatemixer/default.nix
@@ -6,11 +6,11 @@
 
 stdenv.mkDerivation rec {
   name = "libmatemixer-${version}";
-  version = "1.21.0";
+  version = "1.20.1";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "1376x3rlisrc6hsz6yzi637msplmacxryyqnrsgfc580knp1nrvm";
+    sha256 = "00p67mi0flsbgn15qpwq60rzf917s5islbmhirbvz6npcvv0d493";
   };
 
   nativeBuildInputs = [ pkgconfig intltool ];
diff --git a/pkgs/desktops/mate/libmateweather/default.nix b/pkgs/desktops/mate/libmateweather/default.nix
index e6769a2e978e..9805b8d91b5a 100644
--- a/pkgs/desktops/mate/libmateweather/default.nix
+++ b/pkgs/desktops/mate/libmateweather/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "libmateweather-${version}";
-  version = "1.21.0";
+  version = "1.20.2";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "1vj2pgry6wdscdcpwwagqlsjf8rkh4id67iw7d9qk1pfbhb2sznl";
+    sha256 = "1ksp1xn13m94sjnnrx2dyv7hlbgjbnbahwdyaq35r2419b366hxv";
   };
 
   nativeBuildInputs = [ pkgconfig intltool ];
diff --git a/pkgs/desktops/mate/marco/default.nix b/pkgs/desktops/mate/marco/default.nix
index e2c2a54bc748..975c80b1d0cf 100644
--- a/pkgs/desktops/mate/marco/default.nix
+++ b/pkgs/desktops/mate/marco/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "marco-${version}";
-  version = "1.21.0";
+  version = "1.20.3";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "1vg3dl7kqhzgspa2ykyql4j3bpki59769qrkakqfdcavb9j5c877";
+    sha256 = "192nlr4ylisxisk0ljabm8v0a5sapdncj4gbw39q2fpr938ifs32";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/mate-applets/default.nix b/pkgs/desktops/mate/mate-applets/default.nix
index 59316039b36b..f9f0689fa65f 100644
--- a/pkgs/desktops/mate/mate-applets/default.nix
+++ b/pkgs/desktops/mate/mate-applets/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-applets-${version}";
-  version = "1.21.0";
+  version = "1.20.3";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "0jr66xrwjrlyh4hz6h5axh96pgxm8n1xyc0rmggah2fijs940rsb";
+    sha256 = "0y5501wliipxf43p2q9917r3ird7azlrbcwnj2q2q2zy00hvvk5f";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/mate-calc/default.nix b/pkgs/desktops/mate/mate-calc/default.nix
index a4d7e0a20988..d45563db8a1c 100644
--- a/pkgs/desktops/mate/mate-calc/default.nix
+++ b/pkgs/desktops/mate/mate-calc/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-calc-${version}";
-  version = "1.21.0";
+  version = "1.20.3";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "07mmc99wwgqbp15zrr6z7iz0frc388z19jwk28ymyzgn6bcc9cn6";
+    sha256 = "0nv0q2c93rv36dhid7vf0w0rb6zdwyqaibfsmc7flj00qgsn3r5a";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/mate-control-center/default.nix b/pkgs/desktops/mate/mate-control-center/default.nix
index bc5a78c5a4b2..8697a150881b 100644
--- a/pkgs/desktops/mate/mate-control-center/default.nix
+++ b/pkgs/desktops/mate/mate-control-center/default.nix
@@ -5,11 +5,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-control-center-${version}";
-  version = "1.21.0";
+  version = "1.20.4";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "0m40jr1midh5fzk3k97sydihlqfqjvzxlgmkx8w2j30a09h7230w";
+    sha256 = "1rjxndikj0w516nlvyzcss31l9qjwkzvns7ygasnjbl02bgml9a4";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/mate-desktop/default.nix b/pkgs/desktops/mate/mate-desktop/default.nix
index 124cd644467e..e6a43e6b457d 100644
--- a/pkgs/desktops/mate/mate-desktop/default.nix
+++ b/pkgs/desktops/mate/mate-desktop/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-desktop-${version}";
-  version = "1.21.0";
+  version = "1.20.4";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "0qd76p5zqgifiawkgv2casb9ll55j4qq4pfxgxj3j5zvjr3dgr47";
+    sha256 = "073hn68f57ahif0znbx850x6ncsq50m7jg0sy1mllxjjqf3b1fxr";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/mate-icon-theme/default.nix b/pkgs/desktops/mate/mate-icon-theme/default.nix
index c18dd7783809..9d813e715ffd 100644
--- a/pkgs/desktops/mate/mate-icon-theme/default.nix
+++ b/pkgs/desktops/mate/mate-icon-theme/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-icon-theme-${version}";
-  version = "1.21.0";
+  version = "1.20.3";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "170vir6h9sgsibd4kfq5qgz542qrw94q3qakqry77clls5wj6b62";
+    sha256 = "10l58mjc2a69pm7srxvlav2b8b7nbzyvwjrlrk79a3gr6dd1mbk4";
   };
 
   nativeBuildInputs = [ pkgconfig intltool iconnamingutils ];
diff --git a/pkgs/desktops/mate/mate-media/default.nix b/pkgs/desktops/mate/mate-media/default.nix
index 11f71d109377..643f67cd1e95 100644
--- a/pkgs/desktops/mate/mate-media/default.nix
+++ b/pkgs/desktops/mate/mate-media/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-media-${version}";
-  version = "1.21.0";
+  version = "1.20.2";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "0mgx4xjarpyvyaw0p0jnh74447y6zd93fvpi12078vyqr25dsi43";
+    sha256 = "06fka82smrphzj4dz9dw1566kmdscxvxl0rchj9qxg7aidy0rmnv";
   };
 
   buildInputs = [
diff --git a/pkgs/desktops/mate/mate-menus/default.nix b/pkgs/desktops/mate/mate-menus/default.nix
index 94a7f572b16b..9a0db6107e1a 100644
--- a/pkgs/desktops/mate/mate-menus/default.nix
+++ b/pkgs/desktops/mate/mate-menus/default.nix
@@ -2,16 +2,16 @@
 
 stdenv.mkDerivation rec {
   name = "mate-menus-${version}";
-  version = "1.21.0";
+  version = "1.20.2";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "168f7jgm4kbnx92xh3iqvvrgpkv1q862xg27zxg40nkz5xhk95hx";
+    sha256 = "18y4nka38dqqxycxpf7ig4vmrk4i05xqqjk4fxr1ghkj60xxyxz2";
   };
 
-  nativeBuildInputs = [ pkgconfig intltool ];
+  nativeBuildInputs = [ pkgconfig intltool gobject-introspection ];
 
-  buildInputs = [ glib gobject-introspection python ];
+  buildInputs = [ glib python ];
 
   makeFlags = [
     "INTROSPECTION_GIRDIR=$(out)/share/gir-1.0/"
diff --git a/pkgs/desktops/mate/mate-notification-daemon/default.nix b/pkgs/desktops/mate/mate-notification-daemon/default.nix
index 748a45eda79c..e9f8b4b75b1f 100644
--- a/pkgs/desktops/mate/mate-notification-daemon/default.nix
+++ b/pkgs/desktops/mate/mate-notification-daemon/default.nix
@@ -3,11 +3,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-notification-daemon-${version}";
-  version = "1.20.1";
+  version = "1.20.2";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "0hwswgc3i6d7zvmj0as95xjjw431spxkf1d37mxwaf6j80gx0p78";
+    sha256 = "0a60f67yjvlffrnviqgc64jz5l280f30h8br7wz2x415if5dmjyn";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/mate-panel/default.nix b/pkgs/desktops/mate/mate-panel/default.nix
index 92da012ca7da..a7d34fc85a64 100644
--- a/pkgs/desktops/mate/mate-panel/default.nix
+++ b/pkgs/desktops/mate/mate-panel/default.nix
@@ -1,18 +1,19 @@
-{ stdenv, fetchurl, pkgconfig, intltool, itstool, glib, dbus-glib, libwnck3, librsvg, libxml2, gnome3, mate, hicolor-icon-theme, wrapGAppsHook }:
+{ stdenv, fetchurl, pkgconfig, intltool, itstool, glib, dbus-glib, libwnck3, librsvg, libxml2, gnome3, mate, hicolor-icon-theme, gobject-introspection, wrapGAppsHook }:
 
 stdenv.mkDerivation rec {
   name = "mate-panel-${version}";
-  version = "1.21.1";
+  version = "1.20.4";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "0093pimqkx5db2nciksgrmq02hldg08p7hghafky3njl0kzv8l5z";
+    sha256 = "02pdrwgl3plgv6l6nc45nsnmjppkxs4ybggwibd6mm777i9nb44d";
   };
 
   nativeBuildInputs = [
-    pkgconfig
+    gobject-introspection
     intltool
     itstool
+    pkgconfig
     wrapGAppsHook
   ];
 
diff --git a/pkgs/desktops/mate/mate-polkit/default.nix b/pkgs/desktops/mate/mate-polkit/default.nix
index b5d87acded80..5f1dfaa5ba4e 100644
--- a/pkgs/desktops/mate/mate-polkit/default.nix
+++ b/pkgs/desktops/mate/mate-polkit/default.nix
@@ -2,21 +2,21 @@
 
 stdenv.mkDerivation rec {
   name = "mate-polkit-${version}";
-  version = "1.20.1";
+  version = "1.20.2";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "05g6k5z903p9p0dbi0y61z5chip52gqrhy5zrjn6xjxv1ad29lsk";
+    sha256 = "0zajisavrxiynmp4qg7zamvkpnhy9nra01czwn21h6hm2yakbayr";
   };
 
   nativeBuildInputs = [
-    pkgconfig
+    gobject-introspection
     intltool
+    pkgconfig
   ];
 
   buildInputs = [
     gtk3
-    gobject-introspection
     libappindicator-gtk3
     libindicator-gtk3
     polkit
diff --git a/pkgs/desktops/mate/mate-power-manager/default.nix b/pkgs/desktops/mate/mate-power-manager/default.nix
index 14f5f0443730..a9c162e59122 100644
--- a/pkgs/desktops/mate/mate-power-manager/default.nix
+++ b/pkgs/desktops/mate/mate-power-manager/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-power-manager-${version}";
-  version = "1.21.0";
+  version = "1.20.3";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "1l7rxv16j95w26igs4n7fdfv5hqm91b9ddc1lw5m26s42nkzzf85";
+    sha256 = "17x47j5dkxxsq63bv2jwf3xgnddyy2dya4y14ryivq8q3jh5yhr5";
   };
 
   buildInputs = [
diff --git a/pkgs/desktops/mate/mate-screensaver/default.nix b/pkgs/desktops/mate/mate-screensaver/default.nix
index b4c215339b55..089296a0b842 100644
--- a/pkgs/desktops/mate/mate-screensaver/default.nix
+++ b/pkgs/desktops/mate/mate-screensaver/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-screensaver-${version}";
-  version = "1.21.0";
+  version = "1.20.3";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "1asfw2x0ha830ilkw97bjdqm2gnjbpb6dd7lb6h43aix7g3lgm7f";
+    sha256 = "0kmaj4psg7261h02dzarga6k5cb7n709d60xbfrhywnf5fb9787i";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/mate-sensors-applet/default.nix b/pkgs/desktops/mate/mate-sensors-applet/default.nix
index a317b175f9bb..86cbd3a86d25 100644
--- a/pkgs/desktops/mate/mate-sensors-applet/default.nix
+++ b/pkgs/desktops/mate/mate-sensors-applet/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-sensors-applet-${version}";
-  version = "1.21.0";
+  version = "1.20.3";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "1l84hfxz5qzipchxxi5whccq5d0kg9c8fxisar8pbckl6763b4dx";
+    sha256 = "0s98qy3jkri9zh5xqffprqd00cqspaq9av0mcrcakjkl8wyfh2g6";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/mate-session-manager/default.nix b/pkgs/desktops/mate/mate-session-manager/default.nix
index 38881e425762..31f447861fc8 100644
--- a/pkgs/desktops/mate/mate-session-manager/default.nix
+++ b/pkgs/desktops/mate/mate-session-manager/default.nix
@@ -5,11 +5,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-session-manager-${version}";
-  version = "1.21.0";
+  version = "1.20.2";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "1556kn4sk41x70m8cx200g4c9q3wndnhdxj4vp93sw262yqmk9mn";
+    sha256 = "05qq07b568qf6zyy459wajhfpbx1wfrinw3hsbky7abdjfn529dy";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/mate-settings-daemon/default.nix b/pkgs/desktops/mate/mate-settings-daemon/default.nix
index 4138a042856b..2be518bcc5e1 100644
--- a/pkgs/desktops/mate/mate-settings-daemon/default.nix
+++ b/pkgs/desktops/mate/mate-settings-daemon/default.nix
@@ -4,11 +4,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-settings-daemon-${version}";
-  version = "1.21.0";
+  version = "1.20.4";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "1k0xbwxpv3wfl7z3hgaf2ylzaz3aky4j7awdy8cfgxr0d6nqhp3w";
+    sha256 = "10xlg2gb7fypnn5cnr14kbpjy5jdfz98ji615scz61zf5lljksxh";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/mate-system-monitor/default.nix b/pkgs/desktops/mate/mate-system-monitor/default.nix
index c3f29dff6319..5757f5eb9b40 100644
--- a/pkgs/desktops/mate/mate-system-monitor/default.nix
+++ b/pkgs/desktops/mate/mate-system-monitor/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-system-monitor-${version}";
-  version = "1.21.0";
+  version = "1.20.2";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "0filf6qyw4fk45br3cridbqdngwl525z49zn36r7q4agzhny4phz";
+    sha256 = "0f6sh23axzmcmyv0d837gbc0dixf1afh8951zrzp1y53rdgpa9qn";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/mate-terminal/default.nix b/pkgs/desktops/mate/mate-terminal/default.nix
index ce8f58cc99b2..9b0018e8e2fc 100644
--- a/pkgs/desktops/mate/mate-terminal/default.nix
+++ b/pkgs/desktops/mate/mate-terminal/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-terminal-${version}";
-  version = "1.21.0";
+  version = "1.20.2";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "15vx7b5nbjbym22pz3l3cyqhv4dnd6vl2hb56xhwq625aw2a7chv";
+    sha256 = "0fqyi0az4ax1gyk5gymd7ssq2crdcd7slmqljc1b1pa283ql7p3q";
   };
 
   buildInputs = [
diff --git a/pkgs/desktops/mate/mate-user-guide/default.nix b/pkgs/desktops/mate/mate-user-guide/default.nix
index 9992d911814d..5264c772a537 100644
--- a/pkgs/desktops/mate/mate-user-guide/default.nix
+++ b/pkgs/desktops/mate/mate-user-guide/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-user-guide-${version}";
-  version = "1.21.0";
+  version = "1.20.2";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "0ayg570000calzpj51dwhh5mil11s0nrhl21c0si3sxr8f5cld6q";
+    sha256 = "0cbi625xd7nsifvxbixsb29kj2zj14sn0sl61wkcvasz7whg7w6r";
   };
 
   nativeBuildInputs = [ itstool intltool libxml2 ];
diff --git a/pkgs/desktops/mate/mate-utils/default.nix b/pkgs/desktops/mate/mate-utils/default.nix
index e4cd9126dfaa..17ec165f7559 100644
--- a/pkgs/desktops/mate/mate-utils/default.nix
+++ b/pkgs/desktops/mate/mate-utils/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "mate-utils-${version}";
-  version = "1.21.0";
+  version = "1.20.2";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "0q05zzxgwwk7af05yzcjixjd8hi8cqykirj43g60ikhzym009n4q";
+    sha256 = "0w7hw192jzhad8jab8mjms4x6k2xijvb3rhlbxb6z5n5880xgfqf";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/mozo/default.nix b/pkgs/desktops/mate/mozo/default.nix
index 387df5d45b3d..f2419f7f5e80 100644
--- a/pkgs/desktops/mate/mozo/default.nix
+++ b/pkgs/desktops/mate/mozo/default.nix
@@ -1,21 +1,22 @@
-{ stdenv, fetchurl, pkgconfig, intltool, mate, pythonPackages }:
+{ stdenv, python, fetchurl, pkgconfig, intltool, mate, gtk3, glib, wrapGAppsHook, gobject-introspection }:
 
-stdenv.mkDerivation rec {
-  name = "mozo-${version}";
-  version = "1.20.1";
+python.pkgs.buildPythonApplication rec {
+  pname = "mozo";
+  version = "1.20.2";
+
+  format = "other";
+  doCheck = false;
 
   src = fetchurl {
-    url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "16rkwbq385i2acll0kcsnp4ghdyljylhp06bjdsvbwv6bjspyyrp";
+    url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${pname}-${version}.tar.xz";
+    sha256 = "1q4hqhigimxav2a8xxyd53lq8q80szsphcv37y2jhm6g6wvdmvhd";
   };
-  
-  pythonPath = [ mate.mate-menus pythonPackages.pygobject3 ];
 
-  nativeBuildInputs = [ pkgconfig intltool pythonPackages.wrapPython ];
+  nativeBuildInputs = [ pkgconfig intltool gobject-introspection wrapGAppsHook ];
 
-  buildInputs = [ pythonPackages.python ] ++ pythonPath;
+  propagatedBuildInputs =  [ mate.mate-menus python.pkgs.pygobject3 ];
 
-  preFixup = "wrapPythonPrograms";
+  buildInputs = [ gtk3 glib ];
 
   meta = with stdenv.lib; {
     description = "MATE Desktop menu editor";
diff --git a/pkgs/desktops/mate/pluma/default.nix b/pkgs/desktops/mate/pluma/default.nix
index 9dd992c4699f..abb1b8c28a1b 100644
--- a/pkgs/desktops/mate/pluma/default.nix
+++ b/pkgs/desktops/mate/pluma/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "pluma-${version}";
-  version = "1.21.1";
+  version = "1.20.4";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "0sc69bz0h3f4cpgkyda9fnpjfkvbc20ldh6v3jj8fd3n460bc8ai";
+    sha256 = "0qdbm5y6q8lbabd81mg3rnls5bdvbmfii82f6syqw1cw6381mzgz";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/desktops/mate/python-caja/default.nix b/pkgs/desktops/mate/python-caja/default.nix
index 1659ebaae656..0470086f865f 100644
--- a/pkgs/desktops/mate/python-caja/default.nix
+++ b/pkgs/desktops/mate/python-caja/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "python-caja-${version}";
-  version = "1.20.1";
+  version = "1.20.2";
 
   src = fetchurl {
     url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
-    sha256 = "16y9xri92x7a40db2qakf20c80a6vqy21nwnjhwrki5rqk7nwbgx";
+    sha256 = "16r8mz1b44qgs19d14zadwzshzrdc5sdwgjp9f9av3fa6g09yd7b";
   };
 
   nativeBuildInputs = [