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/pamela/default.nix

@@ -0,0 +1,30 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pkgs
+}:
+
+buildPythonPackage rec {
+  pname = "pamela";
+  version = "1.0.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "65c9389bef7d1bb0b168813b6be21964df32016923aac7515bdf05366acbab6c";
+  };
+
+  postUnpack = ''
+    substituteInPlace $sourceRoot/pamela.py --replace \
+      'find_library("pam")' \
+      '"${lib.getLib pkgs.pam}/lib/libpam.so"'
+  '';
+
+  doCheck = false;
+
+  meta = with lib; {
+    description = "PAM interface using ctypes";
+    homepage = "https://github.com/minrk/pamela";
+    license = licenses.mit;
+  };
+
+}