Hello @WeebyMcWeebface, there's no value in tracking this both at https://github.com/ValveSoftware/Proton/issues/724 and here. Closing in favor of the existing issue report.
@kisak-valve ValveSoftware/Proton#724 was just closed before I made this issue, which is why I created it here, based on the close reason.
Currently this dll is built inside of proton:
it would be nice if this DLL could be integrated with the wine builds rather than a patch by the proton project itself. I suggested pulling this upstream into wine in: https://github.com/ValveSoftware/Proton/issues/724 , and was told this might be the correct place for such an issue to be proposed.