anchor.diff:              url = tfurl "linux" "cpu" "cp27-none-linux_x86_64";
               sha256 = "09pcyx0yfil4dm6cij8n3907pfgva07a38avrbai4qk5h6hxm8w9";
             };
  -          py3 = {
  +          py35 = {
  +            url = tfurl "linux" "cpu" "cp35-cp35m-linux_x86_64";
  +            sha256 = "0p10zcf41pi33bi025fibqkq9rpd3v0rrbdmc9i9yd7igy076a07";
  +          };
  +          py36 = {
               url = tfurl "linux" "cpu" "cp36-cp36m-linux_x86_64";
               sha256 = "1qm8lm2f6bf9d462ybgwrz0dn9i6cnisgwdvyq9ssmy2f1gp8hxk";
             };
  
positive.code:   version = "1.3.0";
    name = "${pname}-${version}";
    format = "wheel";
    disabled = ! (isPy36 || isPy27);
  
    src = let
        tfurl = sys: proc: pykind:
  
negative.code: , mock
  , backports_weakref
  , zlib
  , tensorflow-tensorboard
  }:
  
  assert cudaSupport -> cudatoolkit != null
  