diff --git a/pkgs/applications/terminal-emulators/rxvt-unicode-plugins/urxvt-theme-switch/default.nix b/pkgs/applications/terminal-emulators/rxvt-unicode-plugins/urxvt-theme-switch/default.nix
index d4a3b9a742a4..c7510568e264 100644
--- a/pkgs/applications/terminal-emulators/rxvt-unicode-plugins/urxvt-theme-switch/default.nix
+++ b/pkgs/applications/terminal-emulators/rxvt-unicode-plugins/urxvt-theme-switch/default.nix
@@ -1,16 +1,15 @@
 { lib, stdenv, fetchFromGitHub }:
 
 stdenv.mkDerivation rec {
-  rev = "cfcbcc3dd5a5b09a3fec0f6a1fea95f4a36a48c4";
   pname = "urxvt-theme-switch";
-  version = "unstable-2014-12-21_rev${builtins.substring 0 1 rev}";
+  version = "unstable-2014-12-21";
 
   dontPatchShebangs = true;
 
   src = fetchFromGitHub {
     owner = "felixr";
     repo = "urxvt-theme-switch";
-    inherit rev;
+    rev = "cfcbcc3dd5a5b09a3fec0f6a1fea95f4a36a48c4";
     sha256 = "0x27m1vdqprn3lqpwgxvffill7prmaj6j9rhgvkvi13mzl5wmlli";
   };
 
@@ -25,6 +24,6 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/felixr/urxvt-theme-switch";
     license = "CCBYNC";
     maintainers = with maintainers; [ ];
-    platforms = with platforms; unix;
+    platforms = platforms.unix;
   };
 }