anchor.diff:      keyutils
       libscrypt
       libsodium
  +    liburcu
     ];
   
     preBuild = ''
  
positive.code:     };
      "dev" = {
        fetchzipVersion = 2;
        version = "2016-10-11";
        rev = "4e158e155327d09868453ae9759a58284245175a";
        sha256 = "3bc6ec9e498bdad2a6335ab6853d6e36e572739a7f3d32e4166830e08322ab14";
      };
    };
  
  
negative.code: , libnih
  , libscrypt
  , libsodium
  , liburcu
  , util-linux_lib
  
  , channel ? "stable"
  