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/zstd/default.nix

@@ -0,0 +1,47 @@
+{ lib, pkg-config, fetchPypi, buildPythonPackage
+, buildPackages
+, zstd, pytest }:
+
+buildPythonPackage rec {
+  pname = "zstd";
+  version = "1.5.1.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "9519bb0cd91c4498cd8cf66ef88fb22e5d6a442317704e6afd00b12726d17d0a";
+  };
+
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace "/usr/bin/pkg-config" "${buildPackages.pkg-config}/bin/${buildPackages.pkg-config.targetPrefix}pkg-config"
+  '';
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ zstd ];
+
+  setupPyBuildFlags = [
+    "--external"
+    "--include-dirs=${zstd}/include"
+    "--libraries=zstd"
+    "--library-dirs=${zstd}/lib"
+  ];
+
+  # Running tests via setup.py triggers an attempt to recompile with the vendored zstd
+  ZSTD_EXTERNAL = 1;
+  VERSION = zstd.version;
+  PKG_VERSION = version;
+
+  checkInputs = [ pytest ];
+  checkPhase = ''
+    pytest
+  '';
+
+  meta = with lib; {
+    description = "Simple python bindings to Yann Collet ZSTD compression library";
+    homepage = "https://github.com/sergey-dryabzhinsky/python-zstd";
+    license = licenses.bsd2;
+    maintainers = with maintainers; [
+      eadwu
+    ];
+  };
+}