Rolling builds are failing at present due to an unmet dependency on the salt-minion package. Broadcom have moved the repository with only a few days notice: https://saltproject.io/blog/upcoming-salt-project-docs-and-repo-migration/
Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: vyos-1x : Depends: salt-minion but it is not installable E: Unable to correct problems, you have held broken packages. E: An unexpected failure occurred, exiting...