these 2 derivations will be built:
  /nix/store/5ifcjwgq1rgqjh3g45m24rpgy63qkbv5-iets-0.1.0.drv
  /nix/store/s75piqa613s2xkl7rphmivjkk5b656sj-iets-partest.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy