these 3 derivations will be built:
  /nix/store/81yhw8mpmzb3384vc4d9lfacwfji5yik-iets-deps-0.1.0.drv
  /nix/store/hygpp562cb69chqnrvsv8rh0cxq2z636-iets-0.1.0.drv
  /nix/store/48m83pr0i5w9mwvg7yq58dyh884zcsqg-iets-partest.drv