these 2 derivations will be built:
  /nix/store/wqsjay50cbm07xh9apvhdfgqwvirmyv7-iets-0.1.0.drv
  /nix/store/pzg8xybg3845avjv3zv6fx8f9wdz8yw2-iets-partest.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy