Added aditional info

README.md

@@ -47,8 +47,10 @@ fingerprint matches the one above before accepting.
 
 ## Adding my repo to your Void Linux
 
+Before you start, make sure this repository has packages available for your architecture (you can check your architecture with `xbps-uhelper arch`). If it doesn't, `xbps-install -S` will fail to fetch the repository metadata and you'll be left with a useless config file in `/etc/xbps.d`. Check the Packages table above to see what's available.
+
 ```bash
-echo 'repository=https://git.erisu.de/Erisu/erisus-void-packages/raw/branch/main' | doas tee /etc/xbps.d/10-erisus-repo.conf
+echo 'repository=https://git.erisu.de/Erisu/erisus-void-packages/raw/branch/main/${xbps-uhelper arch}' | doas tee /etc/xbps.d/10-erisus-repo.conf
 doas xbps-install -S
 doas xbps-install -S <package_name>
 ```