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/chiapos/default.nix

@@ -0,0 +1,57 @@
+{ stdenv
+, lib
+, substituteAll
+, buildPythonPackage
+, fetchPypi
+, catch2
+, cmake
+, cxxopts
+, ghc_filesystem
+, pybind11
+, pytestCheckHook
+, pythonOlder
+, psutil
+, setuptools-scm
+}:
+
+buildPythonPackage rec {
+  pname = "chiapos";
+  version = "1.0.9";
+  disabled = pythonOlder "3.7";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-emEHIR74RiIDK04etO/6G7tjzTufOVl4rLRWbEsQit0=";
+  };
+
+  patches = [
+    # prevent CMake from trying to get libraries on the Internet
+    (substituteAll {
+      src = ./dont_fetch_dependencies.patch;
+      inherit cxxopts ghc_filesystem;
+      catch2_src = catch2.src;
+      pybind11_src = pybind11.src;
+    })
+  ];
+
+  nativeBuildInputs = [ cmake setuptools-scm ];
+
+  buildInputs = [ pybind11 ];
+
+  checkInputs = [
+    psutil
+    pytestCheckHook
+  ];
+
+
+  # CMake needs to be run by setuptools rather than by its hook
+  dontConfigure = true;
+
+  meta = with lib; {
+    broken = stdenv.isDarwin;
+    description = "Chia proof of space library";
+    homepage = "https://www.chia.net/";
+    license = licenses.asl20;
+    maintainers = teams.chia.members;
+  };
+}