haskellPackages.mplayer-spot: add runtime dependency on mplayer

pkgs/development/haskell-modules/configuration-nix.nix

@@ -692,4 +692,13 @@ self: super: builtins.intersectAttrs super {
   # checks SQL statements at compile time, and so requires a running PostgreSQL
   # database to run it's test suite
   postgresql-typed = dontCheck super.postgresql-typed;
+
+  # mplayer-spot uses mplayer at runtime.
+  mplayer-spot =
+    let path = pkgs.stdenv.lib.makeBinPath [ pkgs.mplayer ];
+    in overrideCabal (addBuildTool super.mplayer-spot pkgs.makeWrapper) (oldAttrs: {
+      postInstall = ''
+        wrapProgram $out/bin/mplayer-spot --prefix PATH : "${path}"
+      '';
+    });
 }