packer build/compile tmpdir empty on reboot

[147]

Packer had been set up to use /tmp/ directory by default for building/compiling. However, that directory did not contain enough disk space so I edited /usr/bin/packer and set the build/compile directory to ~/.tmp. It works just fine now, but I was wondering is there anyway to empty this directory on reboot the same way /tmp/ is emptied?
Sorry if it's a newbie question. Still learning. Very new to Arch.
Any help appreciated. Thank you.

[WarheadsSE]

https://www.freedesktop.org/software/sy ... les.d.html

You can manage this with tmpfiles.d. An example: https://www.interserver.net/tips/kb/man ... -tmpfiles/