these 2 derivations will be built:
  /nix/store/r5s2ij9wgxi7vhf3nrgb4d1mvnb57i4n-container-test-driver-0.0.1.drv
  /nix/store/kpam6jp8g3x81zm9hbh0f27g0rlw3gw4-container-test-debian-13-ssh.drv