New comment by circhioz on void-packages repository

https://github.com/void-linux/void-packages/pull/28238#issuecomment-767643652

Comment:
Here's my run script :)
```
#!/bin/sh
[ -r conf ] && . ./conf
exec wendy -m 768 -w $SNAPSHOTS_PATH bash -c 'if [ -s "/boot/grub/grub-btrfs.cfg" ]; then /etc/grub.d/41_snapshots-btrfs; else update-grub; fi' 2>&1
```
and conf file
```
SNAPSHOTS_PATH=/.snapshots
```