anchor.diff:      qttools
       qtquickcontrols2
       qtgraphicaleffects
  +    qtkeychain
     ] ++ lib.optional stdenv.isDarwin qtmacextras;
   
     cmakeFlags = [
  
positive.code: , cmark
  , lmdb
  , lmdbxx
  , tweeny
  , mkDerivation
  , qtbase
  , qtmacextras
  , qtmultimedia
  , qttools
  
negative.code:     mtxclient
      olm
      boost17x
      libsecret
      lmdb
      spdlog
      fmt
  