Heroic refuses to run DoomRunner as an alternate EXE for DOOM + DOOM II

I tried to run the flatpak version, didn't work. I even built it myself and installed to my

/usr/bin

/usr/bin

path, Heroic couldn't find it. I then tried to run it through a script, still no luck. How do you do this?

Heroic refuses to run DoomRunner as an alternate EXE for DOOM + DOOM II - Heroic Games Launcher