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/nbstripout/default.nix

@@ -0,0 +1,37 @@
+{lib, python, git, mercurial, coreutils}:
+
+with python.pkgs;
+buildPythonApplication rec {
+  version = "0.5.0";
+  pname = "nbstripout";
+
+  # Mercurial should be added as a build input but because it's a Python
+  # application, it would mess up the Python environment. Thus, don't add it
+  # here, instead add it to PATH when running unit tests
+  checkInputs = [ pytest pytest-flake8 git ];
+  nativeBuildInputs = [ pytest-runner ];
+  propagatedBuildInputs = [ ipython nbformat ];
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "86ab50136998d62c9fa92478d2eb9ddc4137e51a28568f78fa8f24a6fbb6a7d8";
+  };
+
+  # for some reason, darwin uses /bin/sh echo native instead of echo binary, so
+  # force using the echo binary
+  postPatch = ''
+    substituteInPlace tests/test-git.t --replace "echo" "${coreutils}/bin/echo"
+  '';
+
+  # ignore flake8 tests for the nix wrapped setup.py
+  checkPhase = ''
+    PATH=$PATH:$out/bin:${mercurial}/bin pytest .
+  '';
+
+  meta = {
+    description = "Strip output from Jupyter and IPython notebooks";
+    homepage = "https://github.com/kynan/nbstripout";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ jluttine ];
+  };
+}