Linux Gaming

From what I understand you're running the script posted here, right?

ArchWiki link on pacman hooks;

Manpage link for hook format.

What you need is a file - let's call it stick-of-joy.hook - in /etc/pacman.d/hooks:

[Trigger]
Operation = Install
Operation = Upgrade
Type = Package
Target = linux
[Action]
Description = Install a stick of joy
When = PostTransaction
Exec = /bin/bash -c /path/to/script

Writing this up on the go, so might have missed a syntax error or something. Make sure the script is executable - chmod +x /path/to/script.

You can test it by reinstalling the linux package - pacman -S linux.