Unable to get RetroArch to even become aware of the core

[incomingstick]

RetroArch: 1.15.0 (Steam)
OS: Linux desktop 6.2.9-arch1-1

I have followed the git based steps here: https://docs.libretro.com/library/dolphin/

Steps Taken

1. $ cd [steamapps]/common/RetroArch/downloads/
2. $ git clone --depth=1 https://github.com/libretro/dolphin.git
3. $ mkdir ../system/dolphin-emu/
4. $ cp -rfv dolphin/Data/Sys ../system/dolphin-emu/

This leaves me with the folder structure RetroArch/system/dolphin-emu/Sys as per the docs.

However, I do not see the Core listed in RetroArch. No additional instructions are provided in the docs page, so I am lost as to what the next steps should be. The video cuts to a running game before the file copy in the video even finished, with no additional explanation as to how to get things running.

Dolphin is not listed under Cores. When I do to "Install or Restore a Core" is shows the dolphin/ git folder (RetroArch/downloads/dolphin) and I can navigate to dolphin/Data/Sys from there. But after exploring all of the directory tree, each folder ends in an empty directory with no Core found to load.

I have tried both restarting RetroArch from within, as well as completely closing and restarting RetroArch, and Dolphin does not show up at all under Cores still.

[VeggieVampire]

download the libretro-core-info files found here https://github.com/libretro/libretro-core-info into the RetroArch\info folder and restart