Created attachment 444028 [details] emerge --info sys-fs/zfs-9999 (and probably all other versions) fails to build on hardened/linux/musl/amd64: configure: error: xdrmem_create() requires tirpc or libc It should probably pull net-libs/libtirpc as a run-time dependency when on musl libc.
Created attachment 444030 [details, diff] Proposed patch to add dependency
Fixed long ago by commit df1cc0f5f518b877bc29d7b0fa15456203041d0f ("sys-fs/zfs: Fixing bugs #639350 and #642110")