This was reported in bug #246960. I managed to fix this by patching Makefile.in (I wasn't able to run successfully eautoreconf because of version mismatch and others stranges bugs). I updated the ebuild a little bit too.
Created attachment 204539 [details] updated ebuild
Created attachment 204540 [details, diff] patch
Hello Olivier, thanks for the fix and patch. They are now in the science overlay. Etienne.