A couple of users have expressed interest in a flatpak release of brim (see https://flatpak.org/). I had made some progress on this but ran into an issue with getting zeek to run. Flatpak uses OSTree which deduplicates redundant files by hard linking them from a single source. This caused an issue with zeek, which crashed while loading the baseline zeek scripts. zeek/zeek#928 has been filed to fix this.
We've discussed internally some ways we could hack around this. The plan right is to wait for the fix to land in zeek before moving forward on this.