I downloaded the files via the ScummVM GUI tool, download worked fine. But unzipping not, lha works with UnArchiver.
I tested xadlibinfo and it shows GZip, so it should unpack and recognize zip files, but somehow not the one from ScummVM.
I checked with other zip files and there it works, so probably the downloaded file from ScummVM is corrupt.
Update: When I try to redownload it with ScummVM, it crashes Amibench. It seems that fetchurl crashes the system