Add ScummVM derivation

libretro/default.nix

@@ -0,0 +1,5 @@
+{ nixpkgs, stdcxx, libc, upstream, toolchain }:
+
+{
+  scummvm = import ./scummvm { inherit nixpkgs stdcxx libc upstream toolchain; };
+}

libretro/scummvm/default.nix

@@ -0,0 +1,30 @@
+{ nixpkgs, stdcxx, libc, upstream, toolchain }:
+
+nixpkgs.stdenvNoCC.mkDerivation
+  { name = "scummvm";
+
+    src = nixpkgs.fetchFromGitHub
+      { owner = "ehmry";
+        repo = "scummvm";
+        rev = "9e587c53316eb3ae41ae652ff079dbdbca2a8724";
+        sha256 = "0vyjlq6hahhifr9vl74i6i7mgpnr89zxhs5jb7kkr68z3d4vnkgd";
+      };
+
+    nativeBuildInputs = with nixpkgs.buildPackages;
+      [ toolchain pkgconfig ];
+
+    buildInputs = [ upstream.dev libc.dev stdcxx.dev ];
+
+    sourceRoot = "source/backends/platform/libretro/build";
+
+     postUnpack = "chmod -R a+rwX source";
+
+     enableParallelBuilding = true;
+     makeFlags = [ "platform=genode" ];
+
+    installPhase =
+      ''
+        mkdir -p $out/bin
+        cp libretro.so $out/bin
+      '';
+  }

release.nix

@@ -12,5 +12,5 @@
         system = { config = "x86_64-unknown-genode"; };
       };
     in
-    { inherit (pkgs) upstream ports; };
+    { inherit (pkgs) upstream ports libretro; };
 }