anchor.diff:  
     maxminddb-golang = buildFromGitHub {
       version = 2;
  -    rev = "v1.0.0";
  +    rev = "v1.1.0";
       owner  = "oschwald";
       repo   = "maxminddb-golang";
  -    sha256 = "0nwandjs965a9jx8ibki8c2caf7h4h9vy9i6z7c0lpb11lg1lzdm";
  +    sha256 = "0z1hbncy2ang3p6zc9pvijbx7y3vgwfi714a4cm5mx6j6125dl49";
       propagatedBuildInputs = [
         sys
       ];
  
positive.code:   };
  
    slices = buildFromGitHub {
      version = 1;
      rev = "bb44bb2e4817fe71ba7082d351fd582e7d40e3ea";
      owner  = "feyeleanor";
      repo   = "slices";
      sha256 = "05i934pmfwjiany6r9jgp27nc7bvm6nmhflpsspf10d4q0y9x8zc";
      date = "2013-02-25";
      propagatedBuildInputs = [
        raw
      ];
  
negative.code: 
    pq = buildFromGitHub {
      version = 2;
      rev = "22cb3e4c487ce6242e2b03369219e5631eed1221";
      owner  = "lib";
      repo   = "pq";
      sha256 = "0br1hy8nsqnr2y1pljghw2ljbyxyca53f82lcdb7rvckld5aq05g";
      date = "2016-12-31";
    };
  
    probing = buildFromGitHub {
  