anchor.diff:      (mkWith   (optLibverto != null)         "system-verto"        null)
       (mkWith   (optOpenldap != null)         "ldap"                null)
       (mkWith   false                         "tcl"                 null)
  -    (mkWith   (optDb != null)               "system-db"           null)
  +    (mkWith   false                         "system-db"           null)  # Requires db v1.85
     ];
   
     buildPhase = optionalString libOnly ''
  
positive.code: 
  # Optional Dependencies
  , libedit ? null, readline ? null, ncurses ? null, libverto ? null
  , openldap ? null, db ? null
  
  # Crypto Dependencies
  , openssl ? null, nss ? null, nspr ? null
  
negative.code: 
    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
    '';
  
    enableParallelBuilding = true;
  