Excavation of Hob's Barrow will never load without dll loading
Apparently scummvm does not load dlls in the AGS engine, which loads them from the game dir, then tries the 'inbuilt ones'. Scummvm reports it's loading windows dlls in linux (!), then crashes but it also reports a 'TODO' on a dir change to the game dir so it's probably a false log.
Anyway this game in particular changed the name of a dll, so the inbuilt agsspritefont dll/so can't take over.
Either because they actually changed the implementation or because they're 'forcing' a configuration that's more unusual; because it's possible to make it run by building the dll from the AGS sources and forcing the 'clifftop mode' then renaming the .so/.dll and placing it in the game dir to replace the one distributed by GOG.
There are no apparent font errors this way (at least to me).
Since this is sufficient, and it doesn't crash with more functions required (and also the font looks good) i think they didn't really change anything, just forced 'clifftop mode' and renamed the dll.
Since scummvm does not load game dir dlls, this will never work, and until it does it probably should be marked unstable/not scan.
For the record here is the (closed) upstream issue which rejected a hack to make it work with the built-in plugins, which also shows how to edit the code to force clifftop mode and rename the dll:
So basically, either fix the engine to be able to load game directory dlls/so or remove the game from the scanner.