these 2 derivations will be built:
  /nix/store/p27dg1fddfhnx7sda5bxi9yxi1p7gb7z-managed-config.drv
  /nix/store/fp4qg61cvsl0sggrxjsydvc3m496c9hz-managed-config-rehearsal.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy