Ah. It’s Mupen you’re trying to run. You will need to install a bunch of dependencies in order to have it run.
It does sound like lately, everyone wants to play N64 on the gameshelll.
Here’s some info on how to get it running:
Mupen64plus isn’t a core in retroarch, but a standalone. There aren’t any GUI menus or anything to configure, save stats, change settings etc. You’ll need to edit things in the config file if you want to change things.
If it helps, I’ve made a custom image of the OS with Mupen64plus pre installed, and configured, along with a bunch of other things.
Also check out these two:
I’m not sure if they have mupen64plus installed/preconfigured, but they’re definitely worth checking out!