these 2 derivations will be built:
  /nix/store/wm11vy7lv8szbjq6zvi7bd40shjrix7n-closure-info.drv
  /nix/store/k10jlidaiv4rkrlvgazq1mshm79lsfm1-check-vars.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy