these 2 derivations will be built:
  /nix/store/mcnkqby4v36q5zymjnlma3pgk35kkr0m-flake-inputs.drv
  /nix/store/99qn726k8730vmq6ikrd2kcf52rk4lyv-check-flake-inputs.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy