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/development/python-modules/cntk/default.nix

@@ -0,0 +1,61 @@
+{ lib
+, buildPythonPackage
+, pkgs
+, numpy
+, scipy
+, mpi
+, enum34
+, protobuf
+, pip
+, python
+, swig
+}:
+
+let
+  cntk = pkgs.cntk;
+in
+buildPythonPackage {
+  inherit (cntk) name version src;
+
+  nativeBuildInputs = [ swig mpi ];
+  buildInputs = [ cntk mpi ];
+  propagatedBuildInputs = [ numpy scipy enum34 protobuf pip ];
+
+  CNTK_LIB_PATH = "${cntk}/lib";
+  CNTK_COMPONENT_VERSION = cntk.version;
+  CNTK_VERSION = cntk.version;
+  CNTK_VERSION_BANNER = cntk.version;
+
+  postPatch = ''
+    cd bindings/python
+    sed -i 's,"libmpi.so.12","${mpi}/lib/libmpi.so",g' cntk/train/distributed.py
+
+    # Remove distro and libs checks; they aren't compatible with NixOS and besides we guarantee
+    # compatibility by providing a package.
+    cat <<EOF > cntk/cntk_py_init.py
+    def cntk_check_distro_info():
+      pass
+    def cntk_check_libs():
+      pass
+    EOF
+  '';
+
+  postInstall = ''
+    rm -rf $out/${python.sitePackages}/cntk/libs
+    ln -s ${cntk}/lib $out/${python.sitePackages}/cntk/libs
+    # It's not installed for some reason.
+    cp cntk/cntk_py.py $out/${python.sitePackages}/cntk
+  '';
+
+  # Actual tests are broken.
+  checkPhase = ''
+    cd $NIX_BUILD_TOP
+    ${python.interpreter} -c "import cntk"
+  '';
+
+  meta = {
+    inherit (cntk.meta) homepage description license maintainers platforms;
+    # doesn't support Python 3.7
+    broken = lib.versionAtLeast python.version "3.7";
+  };
+}