these 2 derivations will be built:
  /nix/store/fn0idmp2vi6jl8av4spr6kr6dj5cvj29-closure-info.drv
  /nix/store/zsvdj8kic2iyawcvarrm4z9arfphskn2-check-vars.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy