these 3 derivations will be built:
  /nix/store/c13vck1i9bk9agh3g98i1rawsi9gnbf5-iets-deps-0.1.0.drv
  /nix/store/a9ypfcwnmnkvyka0cgw97xyqivzzhm5c-iets-0.1.0.drv
  /nix/store/avnnkn6mjglx5narvzbhcmds4jb2i8rv-iets-langtests.drv