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/ripser/default.nix

@@ -0,0 +1,56 @@
+{ lib
+, buildPythonPackage
+, fetchpatch
+, fetchPypi
+, pythonOlder
+, cython
+, numpy
+, scipy
+, scikit-learn
+, persim
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "ripser";
+  version = "0.6.1";
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "335112a0f94532ccbe686db7826ee8d0714b32f65891abf92c0a02f3cb0fc5fd";
+  };
+
+  patches = [
+    (fetchpatch {
+      url = "https://github.com/scikit-tda/ripser.py/commit/4baa248994cee9a65d710fac91809bad8ed4e5f1.patch";
+      sha256 = "sha256-J/nxMOGOUiBueojJrUlAaXwktHDploYG/XL8/siF2kY=";
+    })
+  ];
+
+  propagatedBuildInputs = [
+    cython
+    numpy
+    scipy
+    scikit-learn
+    persim
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  preCheck = ''
+    # specifically needed for darwin
+    export HOME=$(mktemp -d)
+    mkdir -p $HOME/.matplotlib
+    echo "backend: ps" > $HOME/.matplotlib/matplotlibrc
+  '';
+
+  meta = with lib; {
+    description = "A Lean Persistent Homology Library for Python";
+    homepage = "https://ripser.scikit-tda.org";
+    license = licenses.mit;
+    maintainers = [ maintainers.costrouc ];
+  };
+}