anchor.diff:  
     procfs = buildFromGitHub {
       version = 2;
  -    rev = "fcdb11ccb4389efb1b210b7ffb623ab71c5fdd60";
  -    date = "2016-12-06";
  +    rev = "1878d9fbb537119d24b21ca07effd591627cd160";
  +    date = "2017-01-28";
       owner  = "prometheus";
       repo   = "procfs";
  -    sha256 = "0jm6xqh21sb6mlanzv7idvg7ag2w8zd7prfmmfzv5ciaz0zbzpx6";
  +    sha256 = "0l94wxacnw9vanqn8rxac8znx7r2015ihak4b24ss9lar6ry0ckp";
     };
   
     properties = buildFromGitHub {
  
positive.code: 
    go-dockerclient = buildFromGitHub {
      version = 2;
      date = "2017-01-26";
      rev = "41e28db8e0cd3d55b80c9c71094093de7406f3c2";
      owner = "fsouza";
      repo = "go-dockerclient";
      sha256 = "09ncvmsyix9b09xh9ql5szm67hjmagmyc1qbspmqnv1qahgki59x";
      propagatedBuildInputs = [
        docker_for_go-dockerclient
        go-cleanhttp
  
negative.code:     version = 2;
      owner = "rjeczalik";
      repo = "notify";
      date = "2017-01-28";
      rev = "9d5aa0c3b735c3340018a4627446c3ea5a04a097";
      sha256 = "1s1jlh83yzvj9mdbbsx08b38kmzywcvsg2wvdxiga6960jfcs66q";
    };
  
    objx = buildFromGitHub {
  