these 2 derivations will be built:
  /nix/store/z28i71dkgaq0xkffq4z69rfs3r2s739i-nixos-test-driver-pgjwt.drv
  /nix/store/vfq4m1x8qcp8q3a9nrdy80wdx77v7rdi-vm-test-run-pgjwt.drv