these 2 derivations will be built:
  /nix/store/6xd87i3ygk5b8gm4iydlbbp0bqbk8226-freebuff-0.2.30.drv
  /nix/store/0jqxi7qqfqqxca0hpipx0jvdlyf68ckm-check-freebuff.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy