these 2 derivations will be built:
  /nix/store/224kbrx791akjijh5zgmwxzj1r2r3yyl-flake-inputs.drv
  /nix/store/5hpv8ll59gff64wzyhk1pw4m93s78kny-check-flake-inputs.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy