If it doesn't work without the libglvnd and xorg-server from bionic-proposed, then there should be versioned Depends: or versioned Breaks: expressing this. Alberto, can you make sure this is added in the next upload?
If it doesn't work without the libglvnd and xorg-server from bionic-proposed, then there should be versioned Depends: or versioned Breaks: expressing this. Alberto, can you make sure this is added in the next upload?