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/k5test/default.nix

@@ -0,0 +1,45 @@
+{ stdenv
+, lib
+, buildPythonPackage
+, fetchPypi
+, substituteAll
+, krb5Full
+, findutils
+, which
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "k5test";
+  version = "0.10.1";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "2c9181133f3d52c8e29a5ba970b668273c08f855e5da834aaee2ea9efeb6b069";
+  };
+
+  patches = [
+    (substituteAll {
+      src = ./fix-paths.patch;
+      inherit findutils krb5Full;
+      # krb5-config is in dev output
+      krb5FullDev = krb5Full.dev;
+      which = "${which}/bin/which";
+    })
+  ];
+
+  # No tests
+  doCheck = false;
+
+  pythonImportsCheck = [ "k5test" ];
+
+  meta = with lib; {
+    broken = (stdenv.isLinux && stdenv.isAarch64) || stdenv.isDarwin;
+    description = "Library for setting up self-contained Kerberos 5 environment";
+    homepage = "https://github.com/pythongssapi/k5test";
+    license = licenses.mit;
+    maintainers = with maintainers; [ ];
+  };
+}