Both find and ldd supply the correct information. It seems that you are on a glibc based system. In this case ldd belongs to the glibc-gcc-binutils package which is not compatible with the musl binaries. On glibc based systems the musl package provides the command musl-ldd which should work correctly. On native musl based debian systems (which do not yet exist) ldd is working as expected.
- Bug#789792: Ldd fails to identify musl binaries Juliusz Chroboczek
- Bug#789792: Ldd fails to identify musl binaries Kevin Bortis