This can apparently be worked around by doing:
ln -s /usr/include/linux /usr/include/x86_64-linux-musl/
ln -s /usr/include/asm-generic /usr/include/x86_64-linux-musl/
ln -s /usr/include/x86_64-linux-gnu/asm /usr/include/x86_64-linux-musl/-- Juliusz -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
