these 2 derivations will be built:
  /nix/store/ygym7hrflbh4wqn1yh9y6xgf9a1bsjyh-rootfs-ubuntu-26_04.tar.drv
  /nix/store/9i2gax4igf6s3q7wwv0z6q9k7bb9a6yi-container-test-ubuntu-26-04-ssh.drv