nvoid is a custom xbps-src repo which includes packages which can not be accepted into void-packages or just experimental and WIP.
all packages support x86_64 (glibc), most of them support x86_64-musl. others has not tested yet.
fetch void-packages tree first
git clone --depth 1 https://github.com/void-linux/void-packages
fetch nvoid as well
git clone --depth 1 https://github.com/not-void/nvoid
merge them
cp -r nvoid/srcpkgs/* void-packages/srcpkgs
cat nvoid/custom-shlibs >> void-packages/etc/shlibs
install xtools and base-devel
xbps-install base-devel xtools
build pkgname and install it
cd void-packages
./xbps-src pkg <pkgname>
xi <pkgname>