these 2 derivations will be built:
  /nix/store/blbnx12jv0z4pzri896bhzpli39xm219-treefmt.drv
  /nix/store/7gk0l085r6pmmpa0cjv7amlc9rkpfj5p-treefmt-check.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy