Is it possible in any way to make this compatible with other mods that change or remove the spaceship crash site? I've encountered this issue myself, and see multiple other people creating bug reports about it. What part of the mod even touches the crash site, and is there a way to make that part optional?

what issue are u talking about ?

Toxic Biters causes the game to crash when loading whenever another mod messes with the spaceship crash site building. https://mods.factorio.com/mod/Toxic_biters/discussion/688e70092fd6d22e39e7b8a6 and https://mods.factorio.com/mod/Toxic_biters/discussion/67be3ebebff7c0bb176bc483 are both examples of reports of this. I myself have encountered it when trying to use the https://mods.factorio.com/mod/some-spaceship-wreck-generator mod.

Basically it seems that this mod is referencing the spaceship entity, so if it's moved or removed it throws an error and the game crashes. This surprised me, because I wouldn't expect a custom biter mod to rely on the starting building in any way, so it took a while to figure out what was going on.

please try the new version

Looks like everything's working now. Thanks!