these 3 derivations will be built:
  /nix/store/m7xilww9bc99944y3gigwwa70r4dmsiw-source.drv
  /nix/store/6havkl79l26ip5sg3lbs3my4b0h3xz6c-iets-deps-0.2.0.drv
  /nix/store/6plcr772gr4b0xrvq35zd59p18rmca7w-iets-nextest-0.2.0.drv