these 3 derivations will be built:
  /nix/store/4kq6vhfras24iab6jzr28my3yk8h9ldv-source.drv
  /nix/store/6dpxp06czym0vqmv3bzs59cmjbvhi4cl-agentty-0.9.21.drv
  /nix/store/1vz647jxizm0v2x5fi0xckyikhx3fpwm-check-agentty.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy