these 2 derivations will be built:
  /nix/store/r99fs1xfi21hrjvk61b79nqb3psmzyzi-closure-info.drv
  /nix/store/vz10njnm8xd0f809agj34mcy36gq7lbv-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