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/servers/sql/patroni/default.nix

@@ -0,0 +1,63 @@
+{ lib
+, pythonPackages
+, fetchFromGitHub
+}:
+
+pythonPackages.buildPythonApplication rec {
+  pname = "patroni";
+  version = "2.1.3";
+
+  src = fetchFromGitHub {
+    owner = "zalando";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-cBkiBrty/6A3rIv9A1oh8GvPjwxhHwYEKuDIsNzHw1g=";
+  };
+
+  # cdiff renamed to ydiff; remove when patroni source reflects this.
+  postPatch = ''
+    for i in requirements.txt patroni/ctl.py tests/test_ctl.py; do
+      substituteInPlace $i --replace cdiff ydiff
+    done
+  '';
+
+  propagatedBuildInputs = with pythonPackages; [
+    boto
+    click
+    consul
+    dnspython
+    kazoo
+    kubernetes
+    prettytable
+    psutil
+    psycopg2
+    pysyncobj
+    python-dateutil
+    python-etcd
+    pyyaml
+    tzlocal
+    urllib3
+    ydiff
+  ];
+
+  checkInputs = with pythonPackages; [
+    flake8
+    mock
+    pytestCheckHook
+    pytest-cov
+    requests
+  ];
+
+  # Fix tests by preventing them from writing to /homeless-shelter.
+  preCheck = "export HOME=$(mktemp -d)";
+
+  pythonImportsCheck = [ "patroni" ];
+
+  meta = with lib; {
+    homepage = "https://patroni.readthedocs.io/en/latest/";
+    description = "A Template for PostgreSQL HA with ZooKeeper, etcd or Consul";
+    license = licenses.mit;
+    platforms = platforms.unix;
+    maintainers = teams.deshaw.members;
+  };
+}