Is this supposed to work on 64-bit systems?I think so, I was able to install it. But I have a different problem with the package lang/wasi-libcxx. It doesn't build if it is already installed. The package seems to circumvent pkgsrc wrappers and trips over itself, so it can't be make replace'd.
Same thing happens with devel/gobject-introspection: http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=56543