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/tools/networking/getmail6/default.nix

@@ -0,0 +1,35 @@
+{ lib
+, python3
+, fetchFromGitHub
+}:
+
+python3.pkgs.buildPythonApplication rec {
+  pname = "getmail6";
+  version = "6.18.9";
+
+  src = fetchFromGitHub {
+    owner = pname;
+    repo = pname;
+    rev = "v${version}";
+    hash = "sha256-qzlURYdE7nv+/wxK3B6WddmhW6xiLS7em3X5O5+CBbI=";
+  };
+
+  # needs a Docker setup
+  doCheck = false;
+
+  pythonImportsCheck = [ "getmailcore" ];
+
+  postPatch = ''
+    # getmail spends a lot of effort to build an absolute path for
+    # documentation installation; too bad it is counterproductive now
+    sed -e '/datadir or prefix,/d' -i setup.py
+  '';
+
+  meta = with lib; {
+    description = "A program for retrieving mail";
+    homepage = "https://getmail6.org";
+    changelog = "https://github.com/getmail6/getmail6/blob/${src.rev}/docs/CHANGELOG";
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ abbe dotlambda ];
+  };
+}