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/salmon-mail/default.nix

@@ -0,0 +1,35 @@
+{ stdenv, lib, buildPythonPackage, fetchPypi, dnspython, chardet, lmtpd
+, python-daemon, six, jinja2, mock, click }:
+
+buildPythonPackage rec {
+  pname = "salmon-mail";
+  version = "3.2.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0q2m6xri1b7qv46rqpv2qfdgk2jvswj8lpaacnxwjna3m685fhfx";
+  };
+
+  checkInputs = [ jinja2 mock ];
+  propagatedBuildInputs = [ chardet dnspython lmtpd python-daemon six click ];
+
+  # Darwin tests fail without this. See:
+  # https://github.com/NixOS/nixpkgs/pull/82166#discussion_r399909846
+  __darwinAllowLocalNetworking = true;
+
+  # The tests use salmon executable installed by salmon itself so we need to add
+  # that to PATH
+  checkPhase = ''
+    # tests fail and pytest is not supported
+    rm tests/server_tests.py
+    PATH=$out/bin:$PATH python setup.py test
+  '';
+
+  meta = with lib; {
+    broken = stdenv.isDarwin;
+    homepage = "https://salmon-mail.readthedocs.org/";
+    description = "Pythonic mail application server";
+    license = licenses.gpl3Only;
+    maintainers = with maintainers; [ jluttine ];
+  };
+}