scumvm: Don't use crossAttrs

pkgs/games/scummvm/default.nix

@@ -20,22 +20,16 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
+  configurePlatforms = [ "host" ];
   configureFlags = [
     "--enable-c++11"
     "--enable-release"
   ];
 
-  crossAttrs = {
-    preConfigure = ''
-      # Remove the --build flag set by the gcc cross wrapper setup
-      # hook
-      export configureFlags="--host=${hostPlatform.config}"
-    '';
-    postConfigure = ''
-      # They use 'install -s', that calls the native strip instead of the cross
-      sed -i 's/-c -s/-c/' ports.mk;
-    '';
-  };
+  # They use 'install -s', that calls the native strip instead of the cross
+  postConfigure = ''
+    sed -i "s/-c -s/-c -s --strip-program=''${STRIP@Q}" ports.mk
+  '';
 
   meta = with stdenv.lib; {
     description = "Program to run certain classic graphical point-and-click adventure games (such as Monkey Island)";