hikari-unlocker need setuid and pam to work.

if hikari exec a non-setuid hikari-unlocker, such as
"$HOME/.guix-profile/bin/hikari-unlocker", it will cause hikari's
lock-mode can't exit, only can press power button to exit it. :(

https://hikari.acmelabs.space/manpage.html

https://hub.darcs.net/raichoo/hikari/browse/src/lock_mode.c#71