these 4 derivations will be built:
  /nix/store/1zh48cxn780vply6p8jz02ziaplqphgp-test-script.drv
  /nix/store/lx1v08l9dvy9fa7iaxnni4ysvrw2fmd2-driverConfiguration.json.drv
  /nix/store/x5ga94wg9jb5biyq3nix5yxh9y7gf0vk-nixos-test-driver-pg_repack.drv
  /nix/store/ina8k2kdpzgdfrfqd6fkcgfp04raxbs3-vm-test-run-pg_repack.drv