CentOS template build fails for module python-xcffib

[misterzed88]

Qubes OS version:

R4.0

Affected component(s):

qubes-python-xcffib

---

Steps to reproduce the behavior:

Following the instructions in https://www.qubes-os.org/doc/building-archlinux-template:

1. Using the Fedora 26 template when setting up the builder VM.
2. Creating a builder.conf using the 'setup' script, with the following options:

• 'Build templates only' enabled
• 'mgmt-salt' disabled
• 'builder-rpm' enabled
• 'centos-7' being the only selected template

3. Downloading sources with make get-sources
4. Running build with make qubes-vm
5. Creating template with make template
6. The template creation fails, complaining about missing setup.py for the 'python-xcffib' package.

General notes:

The problem is due to the python-xcffib module creating an archive 'xcffib-0.5.1.tar.gz' during the build, overwriting the original archive with the same name.

A workaround is to tell the build to use the existing archive instead of creating one, by adding 'NO_ARCHIVE := 1' to python-xcffib/Makefile.builder

---