anchor.diff:  
     installPhase = optionalString libOnly ''
       mkdir -p $out/{bin,include/{gssapi,gssrpc,kadm5,krb5},lib/pkgconfig,sbin,share/{et,man/man1}}
  -
       (cd util; make install)
       (cd include; make install)
       (cd lib; make install)
       (cd build-tools; make install)
  -
  -    rm -rf $out/{sbin,share}
  -    find $out/bin -type f | grep -v 'krb5-config' | xargs rm
  +    rm -rf $out/{bin,sbin,share}
     '';
   
     enableParallelBuilding = true;
  
positive.code: 
  # Optional Dependencies
  , libedit ? null, readline ? null, ncurses ? null, libverto ? null
  , openldap ? null
  
  # Crypto Dependencies
  , openssl ? null, nss ? null, nspr ? null
  
negative.code:     (mkWith   (optLibverto != null)         "system-verto"        null)
      (mkWith   (optOpenldap != null)         "ldap"                null)
      (mkWith   false                         "tcl"                 null)
      (mkWith   (optDb != null)               "system-db"           null)
    ];
  
    buildPhase = optionalString libOnly ''
  