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/blockchain/default.nix

@@ -0,0 +1,35 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, future
+}:
+
+buildPythonPackage rec {
+  pname = "blockchain";
+  version = "1.4.4";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1qpbmz6dk5gx1996dswpipwhj6sp5j0dlfap012l46zqnvmkxanv";
+  };
+
+  postPatch = ''
+    substituteInPlace setup.py --replace "enum-compat" ""
+  '';
+
+  propagatedBuildInputs = [
+    future
+  ];
+
+  # tests are interacting with the API and not mocking the calls
+  doCheck = false;
+
+  pythonImportsCheck = [ "blockchain" ];
+
+  meta = with lib; {
+    description = "Python client Blockchain Bitcoin Developer API";
+    homepage = "https://github.com/blockchain/api-v1-client-python";
+    license = with licenses; [ mit ];
+    maintainers = with maintainers; [ fab ];
+  };
+}