these 2 derivations will be built:
  /nix/store/p439w56893afcg2msa34dfbwhw19b3jg-flake-inputs.drv
  /nix/store/fn1ysy84lb19d9z0qhxxdn7plzgr4ml1-check-flake-inputs.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy