these 2 derivations will be built:
  /nix/store/wrf7fxqjc4imis2q2bb9f7j2lab8jwwk-closure-info.drv
  /nix/store/5kfg2mkjla6dfqk7117zf33xp29v4n4g-check-vars.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy