these 4 derivations will be built:
  /nix/store/wg2l6dddbc118dayx5kyvr35ngmskafx-test-script.drv
  /nix/store/p3zwxcf76ic2gxvf82gh1b0r54n8sd6a-driverConfiguration.json.drv
  /nix/store/zl27cv6m8yq84vxr8i26kgy9w4c613rx-nixos-test-driver-pg_repack.drv
  /nix/store/am3pj1mplmkc967b54grpmn7rzb0nfa5-vm-test-run-pg_repack.drv