anchor.diff:    passthru = {
       srcVerification = fetchurl {
         failEarly = true;
  -      pgpsigUrls = map (n: "${n}.asc") src.urls;
  -      pgpKeyFingerprint = "59C2 118E D206 D927 E667  EBE3 D3E5 F56B 6D92 0D30";
  -      inherit (src) urls outputHash outputHashAlgo;
  +      inherit (src)
  +        urls
  +        outputHash
  +        outputHashAlgo;
  +      fullOpts = {
  +        pgpsigUrls = map (n: "${n}.asc") src.urls;
  +        pgpKeyFingerprint = "59C2 118E D206 D927 E667  EBE3 D3E5 F56B 6D92 0D30";
  +      };
       };
     };
   
  
positive.code: }:
  
  stdenv.mkDerivation rec {
    name = "openssh-7.7p1";
  
    src = fetchurl {
      url = "mirror://openbsd/OpenSSH/portable/${name}.tar.gz";
      hashOutput = false;
      sha256 = "d73be7e684e99efcd024be15a30bffcbe41b012b2f7b3c9084aed621775e6b8f";
    };
  
    buildInputs = [
  
negative.code:     sed -i '/INSTALL/s,-m 4,-m 0,' Makefile.in
    '';
  
    configureFlags = [
      "--sysconfdir=/etc/ssh"
      "--localstatedir=/var"
      "--with-pid-dir=/run"
      "--with-ldns"
      "--with-libedit"
      "--with-audit=linux"
      "--with-pie"
      "--with-ssl-dir=${openssl_1-0-2}"
      "--with-ssl-engine"
      "--with-pam"
      "--with-kerberos5"
      "--with-mantype=man"
      "--with-privsep-user=nobody"
    ];
  
    preInstall = ''
  