these 2 derivations will be built:
  /nix/store/jy7b2nxqwlkgwwknb68j9sdz2cv8cfar-collie-1.23.4.drv
  /nix/store/5rqbnp78vdffdc6smd1gj6rzrrif039f-check-collie.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy