New comment by sbogomolov on void-packages repository

https://github.com/void-linux/void-packages/pull/31320#issuecomment-869126721

Comment:
When I tried to use this with `gtkgreet` I have noticed that it was complaining about not being able to use `~/.cache`. This happens because by default home folder is set to `/var/empty`. I have fixed this by adding following to the `template`:
```
_greeter_homedir="/etc/greetd/_greeter"
```
My `INSTALL` looks like this:
```
case ${ACTION} in
post)
        mkdir etc/greetd/_greeter
        chown -R _greeter:_greeter etc/greetd
        ;;
esac
```

And a question for educational purposes :) Why did you choose to use `INSTALL` instead of `post_install()`?