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/version-management/rabbitvcs/default.nix

@@ -0,0 +1,44 @@
+{ fetchFromGitHub, lib, python3Packages, meld, subversion, gvfs, xdg-utils, gtk3 }:
+
+python3Packages.buildPythonApplication rec {
+  pname = "rabbitvcs";
+  version = "0.18";
+  namePrefix = "";
+
+  src = fetchFromGitHub {
+    owner = "rabbitvcs";
+    repo = "rabbitvcs";
+    rev = "v${version}";
+    sha256 = "01cr16zf3gzsci1hhfli79m34fcx5m1pvswl16rkxxn212yc9fhy";
+  };
+
+  buildInputs = [ gtk3 ];
+  pythonPath = with python3Packages; [ configobj pygobject3 pysvn dulwich tkinter gvfs xdg-utils ];
+
+  prePatch = ''
+      sed -ie 's|if sys\.argv\[1\] == "install":|if False:|' ./setup.py
+      sed -ie "s|PREFIX = sys.prefix|PREFIX = \"$out\"|" ./setup.py
+      sed -ie 's|/usr/bin/meld|${meld}/bin/meld|' ./rabbitvcs/util/configspec/configspec.ini
+      sed -ie 's|/usr/bin/svnadmin|${subversion.out}/bin/svnadmin|' ./rabbitvcs/ui/create.py
+      sed -ie "s|/usr/share/doc|$out/share/doc|" ./rabbitvcs/ui/about.py
+      sed -ie "s|gnome-open|xdg-open|" ./rabbitvcs/util/helper.py
+    '';
+
+  outputs = [ "out" "cli" ];
+
+  postInstall = ''
+    mkdir -p $cli/bin
+    cp clients/cli/rabbitvcs $cli/bin
+    wrapPythonProgramsIn $cli "$out $pythonPath"
+  '';
+
+  doCheck = false;
+
+  meta = {
+    description = "Graphical tools for working with version control systems";
+    homepage = "http://rabbitvcs.org/";
+    license = lib.licenses.gpl2Plus;
+    platforms = lib.platforms.linux;
+    maintainers = [ lib.maintainers.mathnerd314 ];
+  };
+}