Was your issue with libremakepkg -w /tmp/buildlibretools:/build that it said:

 |  ==> ERROR: You do not have write permission to create packages in /build.
 |      Aborting...

If so, the issue is that /build must be writable by 'nobody'. You could chown it to nobody, or chmod 777 it, or use ACLs, or whatever. But yeah, I think the issue is with how you set up the permissions on your build dir.

I was getting that permission error, and it works now after running this outside the chroot:

mkdir /tmp/buildlibretools
chown nobody: /tmp/buildlibretools

I think adding an option to build in tmpfs is a good idea to avoid repeating these two commands after every power-off or reboot, when /tmp gets cleared (/tmp is tmpfs by default on Parabola). Also, the directory could be synced to a persistent directory after building so data is not lost.

If this feature is not added, a section "how to keep the build directory in RAM" can be added to the packaging guide wiki page.

I think adding an option to build in tmpfs is a good idea to avoid repeating these two commands after every power-off or reboot

I recommend configuring them in /etc/tmpfiles.d (man tmpfiles.d).

/tmp is tmpfs by default on Parabola

Really? Back in my day, we had to configure /tmp manually :P

lukeshu wrote:

I think adding an option to build in tmpfs is a good idea to avoid repeating these two commands after every power-off or reboot

I recommend configuring them in /etc/tmpfiles.d (man tmpfiles.d).

I see now it provides configurable cleanup time. I didn't know about it. Thanks.