AltSys configures toybox+ubase+sbase (in that order) as your default coreutils, but without actually uninstalling them. This script was made for Void, but it might work on other systems.
Do not mind the janky scripts I made to get sbase to work. (make install on sbase is done by a stupid, undocumented little piece of (POSIX)s**ll script)
$ sudo -i || su
# xbps-install -yu make zig libutf8proc-devel binutils clang zlib-devel libtls-devel mold libutf8proc-devel coreutils sed tree
# git clone https://github.com/xplshn/AltSys/ || chroot-git clone https://github.com/xplshn/AltSys/
# cd AltSys && sh ./xinstall.sh && xbps-remove -ORo make zig sed libutf8proc-devel binutils clang zlib-devel libtls-devel mold binutils libutf8proc-devel coreutils
# tree /opt/AltSys
# exit
I initially also wanted to provide OpenPAM and slicer69's Doas port for Linux, but I figured that is out of the scope for this script(In the future, a package).