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/coincurve/default.nix

@@ -0,0 +1,72 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, asn1crypto
+, autoconf
+, automake
+, cffi
+, libtool
+, pkg-config
+, pytestCheckHook
+, python
+, pythonOlder
+, secp256k1
+}:
+
+buildPythonPackage rec {
+  pname = "coincurve";
+  version = "17.0.0";
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "ofek";
+    repo = "coincurve";
+    rev = "v${version}";
+    sha256 = "sha256-7H4/TDxteuMTrj1PdfpA5rc7CegJAOjqn1PteImfGiQ=";
+  };
+
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace ", 'requests'" ""
+
+    # don't try to load .dll files
+    rm coincurve/_windows_libsecp256k1.py
+    cp -r --no-preserve=mode ${secp256k1.src} libsecp256k1
+    patchShebangs secp256k1/autogen.sh
+  '';
+
+  nativeBuildInputs = [
+    autoconf
+    automake
+    libtool
+    pkg-config
+  ];
+
+  propagatedBuildInputs = [
+    asn1crypto
+    cffi
+  ];
+
+  preCheck = ''
+    # https://github.com/ofek/coincurve/blob/master/tox.ini#L20-L22=
+    rm -rf coincurve
+
+    # don't run benchmark tests
+    rm tests/test_bench.py
+  '';
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "coincurve"
+  ];
+
+  meta = with lib; {
+    description = "Cross-platform bindings for libsecp256k1";
+    homepage = "https://github.com/ofek/coincurve";
+    license = with licenses; [ asl20 mit ];
+    maintainers = with maintainers; [ SuperSandro2000 ];
+  };
+}