Comment 3 for bug 1593134

snapd is seeded in everything but powerpc. images will only be created for i386, amd64, armhf and arm64. we do build generic and module-less initrds at rootfs build time that require hackery to be re-packed when you build a kernel snap, this is what we would like to avoid ... (one expectation is to not have the initrd exceed 2MB)

despite the initrd, if snapd is seeded you have it installed and have a requirement for squashfs with the first use of it.