clementine: each output should hav a wrapped `GST_PLUGIN_SYSTEM_PATH_1_0`

see ef5e212d20 (r28723596)

/cc @jtojnar

pkgs/applications/audio/clementine/default.nix

@@ -70,7 +70,9 @@ let
 
   free = stdenv.mkDerivation {
     name = "clementine-free-${version}";
-    inherit src patches nativeBuildInputs buildInputs postPatch;
+    inherit src patches nativeBuildInputs postPatch;
+
+    buildInputs = buildInputs ++ [ makeWrapper ];
 
     cmakeFlags = [ "-DUSE_SYSTEM_PROJECTM=ON" ];
 
@@ -78,6 +80,11 @@ let
 
     passthru.unfree = unfree;
 
+    postInstall = ''
+      wrapProgram $out/bin/clementine \
+        --prefix GST_PLUGIN_SYSTEM_PATH_1_0 : "$GST_PLUGIN_SYSTEM_PATH_1_0"
+    '';
+
     meta = with stdenv.lib; {
       homepage = http://www.clementine-player.org;
       description = "A multiplatform music player";
@@ -108,8 +115,7 @@ let
       rmdir $out/bin
 
       makeWrapper ${free}/bin/clementine $out/bin/clementine \
-        --set CLEMENTINE_SPOTIFYBLOB $out/libexec/clementine \
-        --prefix GST_PLUGIN_SYSTEM_PATH_1_0 : "$GST_PLUGIN_SYSTEM_PATH_1_0"
+        --set CLEMENTINE_SPOTIFYBLOB $out/libexec/clementine
 
       mkdir -p $out/share
       for dir in applications icons kde4; do