anchor.diff:      ];
       buildInputs = [
         net_crypto_lib
  +      sys
       ];
     };
   
  
positive.code:     buildInputs = [
        mathutil
      ];
    };
  
    flagfile = buildFromGitHub {
  
negative.code: 
    ns1-go_v2 = buildFromGitHub {
      version = 2;
      rev = "5bff869d22e76e3699281eaa61d9d285216f321a";
      owner  = "ns1";
      repo   = "ns1-go";
      sha256 = "0r2b81pl0ir6z93jdsdvr2wnk6qx1lx9rw8n1b7g2375bd0z1jva";
      goPackagePath = "gopkg.in/ns1/ns1-go.v2";
      date = "2017-03-21";
    };
  
    msgp = buildFromGitHub {
  