Hi 
I’m having a look on
with a “Qubes executor” - and I think python3-lxml is missing as a dependency for Fedora (it’s listed as a dependency for Debian):
Fedora:
$ sudo dnf install python3-packaging createrepo_c devscripts gpg qubes-gpg-split python3-pyyaml rpm docker python3-docker podman python3-podman reprepro python3-pathspec rpm-sign mktorrent openssl tree
Debian:
$ sudo apt install python3-packaging createrepo-c devscripts gpg qubes-gpg-split python3-yaml rpm docker python3-docker reprepro python3-pathspec mktorrent openssl tree python3-setuptools python3-lxml