these 2 derivations will be built:
  /nix/store/6ccy7bq55qgc9ybpy853gb0zh8ch50ri-freebuff-0.2.32.drv
  /nix/store/rh1zw6fkc9kmnlmzr9xarhji6av2v93p-check-freebuff.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy