these 2 derivations will be built:
  /nix/store/rgyb5vwsm6b90ymcjm3351zvxcf6mlaq-closure-info.drv
  /nix/store/lkgr7swd2lmcd66vygrlk2bdbqr764ld-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