these 2 derivations will be built:
  /nix/store/g7dv4gc3lwfgn1vlhprmxmiq35mzgz76-source.drv
  /nix/store/q5wylimh69bysvlbnix4b3v94nydxgb3-mcptoon-0.7.1.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy