anchor.diff:      cd src
     '';
   
  -  nativeBuildInputs = [ pkgconfig perl yacc ]
  -    # Provides the mig command used by the build scripts
  -    ++ stdenv.lib.optional stdenv.isDarwin bootstrap_cmds;
  +  nativeBuildInputs = [ pkgconfig perl yacc ];
     buildInputs = [ optOpenssl optLibverto optOpenldap ]
       ++ cryptoInputs ++ tlsInputs ++ lineParserInputs;
   
  
positive.code: { stdenv, fetchurl, pkgconfig, perl, yacc, bootstrap_cmds
  
  # Optional Dependencies
  , libedit ? null, readline ? null, ncurses ? null, libverto ? null
  
negative.code:     find $out/bin -type f | grep -v 'krb5-config' | xargs rm
    '';
  
    meta = {
      description = "MIT Kerberos 5";
      homepage = http://web.mit.edu/kerberos/;
  