these 2 derivations will be built:
  /nix/store/21gycvy2klj020pkkr80rjp1zqhsdsj6-flake-inputs.drv
  /nix/store/gnz3gmrb1yzpbfm60rwmp7r0cdx4gmrs-check-flake-inputs.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy