these 2 derivations will be built:
  /nix/store/g3gf9v1lla0qgqqygjjlxggkwcszjsg8-nixos-test-driver-hypopg.drv
  /nix/store/5zdzl5csv0xq5csaq3gv03b0fbdbfbbm-vm-test-run-hypopg.drv