mate: remove major-ver and minor-ver

Keep only the version atribute in derivations, with the full version
string of the package. This will make it easier to write a script for
automatic updating of the packages using the update-source-version
command from common-updater-scripts.

pkgs/desktops/mate/caja-extensions/default.nix

@@ -1,13 +1,11 @@
-{ stdenv, fetchurl, pkgconfig, intltool, gtk3, dbus_glib, gupnp, caja, mate-desktop, imagemagick, wrapGAppsHook }:
+{ stdenv, fetchurl, pkgconfig, intltool, gtk3, dbus_glib, gupnp, mate, imagemagick, wrapGAppsHook }:
 
 stdenv.mkDerivation rec {
   name = "caja-extensions-${version}";
-  version = "${major-ver}.${minor-ver}";
-  major-ver = "1.18";
-  minor-ver = "2";
+  version = "1.18.2";
 
   src = fetchurl {
-    url = "http://pub.mate-desktop.org/releases/${major-ver}/${name}.tar.xz";
+    url = "http://pub.mate-desktop.org/releases/${mate.getRelease version}/${name}.tar.xz";
     sha256 = "065j3dyk7zp35rfvxxsdglx30i3xrma4d4saf7mn1rn1akdfgaba";
   };
 
@@ -21,8 +19,8 @@ stdenv.mkDerivation rec {
     gtk3
     dbus_glib
     gupnp
-    caja
-    mate-desktop
+    mate.caja
+    mate.mate-desktop
     imagemagick
   ];