these 2 derivations will be built:
  /nix/store/qkkkfzs6msad3yklb5vpf4y5l0annkqs-iets-0.1.0.drv
  /nix/store/znpl9748w6vc96vdn7mzksnx7vpq4i9b-iets-diff-e2e.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy