I'm trying to update the Gentoo ebuild to the new 2.0.1 release. So I'm trying to compile Doomsday from source. But the first problem I've run into is that when I download a tarball (or the master.zip), the sources for assimp are not included for some reason. Is this intentional, or is this some oversight? Cmake fails as a result. I downloaded an assimp tarball and extracted it into the proper directory in the Doomsday source tree, but it appears that the assimp version in Doomsday's source tree is fixed at a specific version. Will using a different version cause problems? Is assimp customized or patched in some way, or is it simply an old version?