these 2 derivations will be built:
  /nix/store/g7ys9g4yl3kix3xl2np5hkv82n7xhz5n-closure-info.drv
  /nix/store/g7v8ddnbdx79lvzrbn43wl53mx0ps0cn-check-vars.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy