Description:

Since systemd 252 it can't disable any running service/socket via PKGBUILD .install script

Additional info:

For and example I am testing this PKGBUILD. https://github.com/CachyOS/CachyOS-DNSCrypt-Proxy. Here the pkg contains dnscrypt-proxy.install script which fails to disable the activated service during uninstall.

Steps to reproduce:

Just try to uninstall any program whose service/socket that was installed and enabled via PKGBUILD's .install script.
For and example, systemctl disable --now dnscrypt-proxy -f in post_remove() for the following project's dnscrypt-proxy.install script is no more working via systemd 252 and later versions (Previously worked with systemd 251.7-4 I downgraded systemd already and retried was working then).

But for an example in post_install() section systemctl enable --now dnscrypt-proxy -f working flawlessly. But when uninstalling its showing that Failed to disable unit: dnscrypt-proxy.service doesn't exist.

Then I checked with systemctl status dnscrypt-proxy and the status is not-found (active running) and current command vanished from the unit file. Which is very weird. But I have tried manually to disable that (working after installation only).

But after uninstalling the pkg, the service disabling is not working and only stopping the service is working. If its not stopped then it also persists in the future boots. Very Very weird bug from latest systemd.