these 6 derivations will be built:
  /nix/store/x4cq918mf8iwqn9k8x9hgapaldsznin9-iets-0.1.0.drv
  /nix/store/k4slvgpdjbrg4bjjfli51x86cvfd5gj0-closure-info.drv
  /nix/store/1s663fyq9d8vngwfd5pvl0msrkiziz6v-test-script.drv
  /nix/store/3b15zgfsw9nayillmlhcvfk8z8pfgjbv-driverConfiguration.json.drv
  /nix/store/ygjh4ksg90zjynbsiiws1789mc9kmxgs-nixos-test-driver-iets-cachetest.drv
  /nix/store/vsb8n9xx6aq2c9n8csgqdkrqs4d81y6a-container-test-run-iets-cachetest.drv