uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/games/keen4/default.nix

@@ -0,0 +1,50 @@
+{ lib, stdenv, fetchurl, dosbox, unzip }:
+
+stdenv.mkDerivation {
+  name = "keen4";
+
+  src = fetchurl {
+    url = "http://tarballs.nixos.org/keen4.zip";
+    sha256 = "12rnc9ksl7v6l8wsxvr26ylkafzq80dbsa7yafzw9pqc8pafkhx1";
+  };
+
+  nativeBuildInputs = [ unzip ];
+
+  installPhase = ''
+    mkdir -p $out/share/keen4
+    mv * $out/share/keen4
+
+    mkdir -p $out/bin
+    cat > $out/bin/keen4 <<EOF
+    #! $SHELL -e
+    if test -z "\$HOME"; then
+        echo "HOME directory not set"
+        exit 1
+    fi
+
+    # Game wants to write in the current directory, but of course we can't
+    # let it write in the Nix store.  So create symlinks to the game files
+    # in ~/.keen4 and execute game from there.
+    mkdir -p \$HOME/.keen4
+    cd \$HOME/.keen4
+
+    ln -sf $out/share/keen4/* .
+
+    ${dosbox}/bin/dosbox ./KEEN4E.EXE -fullscreen -exit || true
+
+    # Cleanup the symlinks.
+    for i in *; do
+        if test -L "\$i"; then
+            rm "\$i"
+        fi
+    done
+    EOF
+    chmod +x $out/bin/keen4
+  '';
+
+  meta = {
+    description = "Commander Keen Episode 4: Secret of the Oracle";
+    license = lib.licenses.unfree;
+    maintainers = [ lib.maintainers.eelco ];
+  };
+}