> FreeBSD ports are probably a good example of these in the wild.

FreeBSD ports are nearly always tiny patches on a project together it to compile on that OS, and look for its config in /usr/local/etc instead of /etc. It is the original software plus minimal tweaks. Linux distros do the exact same thing. When you install a Debian package, you’re getting Debian’s patched version. Same for RedHat, Homebrew, and nearly every other package manager.

The fork we’re discussing here is a rewrite of the original in a different language while still calling it the original name.