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/applications/graphics/inkscape/extensions.nix

@@ -0,0 +1,46 @@
+{ lib, stdenv
+, fetchFromGitHub
+, runCommand
+, inkcut
+, callPackage
+}:
+
+{
+  applytransforms = callPackage ./extensions/applytransforms { };
+
+  hexmap = stdenv.mkDerivation {
+    pname = "hexmap";
+    version = "unstable-2020-06-06";
+
+    src = fetchFromGitHub {
+      owner = "lifelike";
+      repo = "hexmapextension";
+      rev = "11401e23889318bdefb72df6980393050299d8cc";
+      sha256 = "1a4jhva624mbljj2k43wzi6hrxacjz4626jfk9y2fg4r4sga22mm";
+    };
+
+    preferLocalBuild = true;
+
+    installPhase = ''
+      runHook preInstall
+
+      mkdir -p "$out/share/inkscape/extensions"
+      cp -p *.inx *.py "$out/share/inkscape/extensions/"
+      find "$out/share/inkscape/extensions/" -name "*.py" -exec chmod +x {} \;
+
+      runHook postInstall
+    '';
+
+    meta = with lib; {
+      description = "This is an extension for creating hex grids in Inkscape. It can also be used to make brick patterns of staggered rectangles";
+      homepage = "https://github.com/lifelike/hexmapextension";
+      license = licenses.gpl2Plus;
+      maintainers = [ maintainers.raboof ];
+      platforms = platforms.all;
+    };
+  };
+  inkcut = (runCommand "inkcut-inkscape-plugin" {} ''
+    mkdir -p $out/share/inkscape/extensions
+    cp ${inkcut}/share/inkscape/extensions/* $out/share/inkscape/extensions
+  '');
+}