SMAPI Installer Doesn't Detect Steam Flatpak Install Folder

[PhasecoreX]

Describe the bug When installing SMAPI to a Flapak Steam Stardew Valley, it will not automatically detect the install folder, despite https://github.com/Pathoschild/SMAPI/commit/76e08fc58b75be3dbcd852bfe53dfed40987871d

To Reproduce

1. Install Linux, Flatpak, Steam in Flatpak, and then Stardew Valley in Steam in Flatpak
2. Download the latest release (4.0.7 in this case)
3. Extract and cd into the folder
4. Run ./install\ on\ Linux.sh
5. Press 2 and enter to select Light text on dark background
6. Be forced to type the file path to the game directory, as the SMAPI Installer couldn't find it automatically.

Log file It's the installer, so no log file(?)

Screenshots

Other notes If I do file "$HOME/.var/app/com.valvesoftware.Steam/data/Steam/steamapps/common/Stardew Valley/Stardew Valley.dll", that file does exist.

I asked on the discord and one person (Yariazen) responded but didn't really know why this was happening. And then that #making-mods-general channel had like a hundred other messages going on at the same time so the conversation got lost. There should probably be a forum type thing in there instead of one channel for everything.