anchor.diff:  , bubblewrap
   , pcre
   , check
  -, python2
  +, python3
   , json_c
   , zchunk
   , libmodulemd
  
positive.code:     librepo
      pcre
      check
      python2
  
      # libdnf # vendored unstable branch
      # required by vendored libdnf
  
negative.code:   };
  
    nativeBuildInputs = [
      python3
      pkg-config
      which
      autoconf
  