Source: libcrypt-xxhash-perl Version: 0.07-1 Hi,
libcrypt-xxhash-perl has an embedded copy of the xxhash source, in ext/xxhash. It seems we have a perfectly fine xxhash package in Debian, building a library package. This one also compiles on all archs, not just i386 and amd64.
Please consider dropping the embedded copy over the packaged library.
Chris