anchor.diff:  
     docker_cli = buildFromGitHub {
       version = 3;
  -    date = "2017-06-02";
  -    rev = "a0066a150be45ede09fb9fa2ac92952e2d52fe19";
  +    date = "2017-06-07";
  +    rev = "9d12d6fc870b3f457d6d317241a8ca2f3f6ff72f";
       owner = "docker";
       repo = "cli";
  -    sha256 = "1l6j92xklj2ljcvx68whc3fv8gv65zcz0whrmbk28zm4s7krwafd";
  +    sha256 = "1zf0ldw0darcgbbglcza5sswzk1c9svvw0v55qj4b877bjqklllc";
       subPackages = [
         "cli/config/configfile"
       ];
  
positive.code: 
    pq = buildFromGitHub {
      version = 3;
      rev = "91f10e40ba0dd2d0bf9f93ec1d4077711a78df88";
      owner  = "lib";
      repo   = "pq";
      sha256 = "02dqpwrikdpz161l236q15saa4w47s4imzsf5cnsa6jh59q73ksa";
      date = "2017-05-30";
    };
  
    probing = buildFromGitHub {
  
negative.code:       purgeTimestamps = true;
        inherit name;
        url = "https://code.googlesource.com/google-api-go-client/+archive/${rev}.tar.gz";
        sha256 = "10qhx1q2jizl2r8g2b5d21x0gplhjy7a7n86yvs8vy6rzizab362";
      };
      buildInputs = [
        appengine
  