if you go to run pungi on an non x86 arch you will hit issues
/usr/bin/isohybrid for instance comes from syslinux and is not available if you run pungi on say armhfp or aarch64.

Additionally some things like jigdo are optional, however pungi refuses to run if jigdo is not installed.

we need better ways to deal with optional features, and mandatory features not available on all arches