these 6 derivations will be built:
  /nix/store/81fq1r3ywj524dgl18hrbvq63bjbq5jy-iets-0.1.0.drv
  /nix/store/mij4lhxdss1xawhar9y74avs5jqdvm71-closure-info.drv
  /nix/store/lg7627i6ayh52w2ghfchhwsg0xn3ijzn-test-script.drv
  /nix/store/fwivhainiq0v7d9awvfkiz6q1bw3ja5z-driverConfiguration.json.drv
  /nix/store/rxi4pk2h29p1m3qdfhlpfd84zqpk87ha-nixos-test-driver-iets-cachetest.drv
  /nix/store/4h10h6mxz1zkrn70f124g0kxjkh8d4ig-container-test-run-iets-cachetest.drv