these 2 derivations will be built:
  /nix/store/ad2x4yzc0iq1yy7fcar6klafm4g6aymb-flake-inputs.drv
  /nix/store/x5gblqjrpa017sr5zsmnd2awiv9r7bf6-check-flake-inputs.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy