these 2 derivations will be built:
  /nix/store/mw6mwaa5d56wk7r0zwwhi1y4rc3jqk2f-closure-info.drv
  /nix/store/bzdabjbx760w5xnnhhhcg2s5pdp95ri7-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
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy