Local Ubuntu jammy and onwards .deb cannot be installed from "debs:" recipe section due to zstd compression

[paoloschi]

Working from my Void Linux system, I am doing my first pleasant experience with pkg2appimage.appimage for which I thank and congratulate you on such a beautiful project.

Sticking to the documentation, in my recipe I included the debs: section, which points to a local directory where I downloaded some official Ubuntu packages.
Now during appimage building I get this message

dpkg-deb: error: archive '<local DEB file name here>' uses unknown compression for member 'control.tar.zst', giving up

for each Ubuntu package I downloaded from jammy (22.04LTS) and subsequent sources mirrors while unpacking goes as expected for archives belonging to focal (20.04LTS) and earlier

Having never used Ubuntu, it took me a web search to find out why: starting from jammy, packages switched from xz to zstd compression format.
The most recent release pkg2appimage-1807-x86_64.AppImage is released Jun 2, 2021 so before jammy…
May we have a new release that could fix this current limitation?

[TheRaven500]

Same problem here with a ppa. Maybe any work a round? Unpack deb manually before building the AppImage for example?

[probonopd]

At this point in time, please use no newer distribution packages than 18.04 (bionic).