anchor.diff:      sha256 = "0sha9ghh6i9ca8bkw7qcjhppkb2dyyzh8zm760y4yi9i660r95h4";
     };
   
  -  envpprof = buildFromGitHub {
  -    version = 3;
  -    rev = "d88ea7f6c8b764503455e5afb131ed9190014e2f";
  -    owner = "anacrolix";
  -    repo = "envpprof";
  -    sha256 = "1r43hxna177260gpz7csj7wkqlmqkzqc0bna5yyf0grr4dvh5rs9";
  -    date = "2017-10-19";
  -  };
  -
     errors = buildFromGitHub {
       version = 3;
       owner = "pkg";
  
positive.code:     date = "2016-08-29";
      rev = "6d3895376368aa52a3a81d2a16e90f0f52371967";
      sha256 = "37a9a3330c2a7fac370ccb7117c681dd6fafeef57d327b3071ec13a279fa7996";
    };
  
    utp = buildFromGitHub {
      version = 3;
      rev = "87ba7933b8d7520e5e6e27460e25e42c2fccab9f";
      owner  = "anacrolix";
      repo   = "utp";
      sha256 = "1ijb2r8sknrxvdqw4x6x2nxwgam0lms9b8dv0v9k1ssbrszy7vr7";
      date = "2017-08-26";
      propagatedBuildInputs = [
        envpprof
        missinggo
        anacrolix_sync
      ];
    };
  
    pborman_uuid = buildFromGitHub {
  
negative.code: 
    sys = buildFromGitHub {
      version = 3;
      rev = "1006bb3484c92b19a5b6612452e038b554fadb9c";
      date = "2017-11-28";
      owner  = "golang";
      repo   = "sys";
      sha256 = "0w89m6212mrh4kajxyp37va974gmmxs32c1hj6417pswr1vl068r";
      goPackagePath = "golang.org/x/sys";
    };
  
  