anchor.diff:  , fetchurl
   , file
   , perlPackages
  -, unzip
   
   , openssl
   }:
  
positive.code:   name = "net-snmp-5.7.3";
  
    src = fetchurl {
      url = "mirror://sourceforge/net-snmp/${name}.zip";
      multihash = "QmPjQkxMk6KDfjDnTFG322EKsbVzdAnnbnNPR4tMLCGy9n";
      sha256 = "0gkss3zclm23zwpqfhddca8278id7pk6qx1mydpimdrrcndwgpz8";
    };
  
    nativeBuildInputs = [
      file
      perlPackages.perl
      unzip
    ];
  
    buildInputs = [
  
negative.code:     )
    '';
  
    passthru = {
      srcVerification = fetchurl {
        failEarly = true;
        pgpsigUrls = map (n: "${n}.asc") src.urls;
        pgpKeyFingerprint = "27CA A4A3 2E37 1383 A33E  D058 7D5F 9576 E0F8 1533";
        inherit (src) urls outputHash outputHashAlgo;
      };
    };
  
    meta = with stdenv.lib; {
      description = "Clients and server for the SNMP network monitoring protocol";
      homepage = http://net-snmp.sourceforge.net/;
  