anchor.diff:          inherit multihash sha256;
         };
   
  +  buildInputs = optionals (channel == "3") [
  +    openssl
  +  ];
  +
     postInstall = optionalString (channel == "3") ''
       ln -s iperf3 $out/bin/iperf
     '';
  
positive.code:       sha256 = "a5350777b191e910334d3a107b5e5219b72ffa393da4186da1e0a4552aeeded6";
      };
      "3" = {
        fetchzipVersion = 2;
        version = "3.1.7";
        sha256 = "5133c033d68d72991cb0b07e7ca1aa82f123e51e971f9fb2f6dc92d904749816";
      };
    };
  
    inherit (stdenv.lib)
      optionalString;
  
    source = sources."${channel}";
  
negative.code: { stdenv
  , fetchFromGitHub
  , fetchurl
  
  , openssl
  
  , channel
  }:
  