Action fails because docker contains doesn't contains mksquashfs

[iTrooz]

You are probably already aware of this, but the action currently fail because the https://hub.docker.com/r/appimagecrafters/appimage-builder docker image doesn't include mksquashfs

The image should probably be updated to include it

[aguilaair]

Any way to fix this inside the action itself for the time bieng?

[Evelios]

I have been trying to figure this one out but haven't had any luck myself. I don't know how to get that program to available inside the docker image for a workaround

[v1993]

You can run

apt-get update && apt-get install -y --no-install-recommends squashfs-tools

as part of your script section as a workaround for the time being.

[git-developer]

The issue was fixed in the image by commit cf1a153, but there's no release yet.

[git-developer]

Related upstream issue is AppImageCrafters/appimage-builder#271