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Changes between Version 3 and Version 4 of Ticket #70420, comment 9

-                      v3
+                      v4
 . There is no facility to manage which version of lua is used as the system default.
 . Uninstalling the `lua` port will break `luarocks` and potentially other lua ports, even though they could use a different version of lua.
+. `neovim` depends on `lua51-lpeg`, which depends on `lua-luarocks`, which depends on `lua` and `lua53-luarocks`, guaranteeing that lua 5.3 will be installed when trying to install neovim.
+. Building `neovim` is breaking because it links against the `lua.h` provided by the `lua` port (currently 5.3), which is incompatible with neovim and luajit (not for any reasons having to do with `luarocks`).
 . `luarocks` always runs against the version of lua installed by the `lua` port, because its shebang is `/opt/local/bin/lua`, which is (currently) lua 5.3 by design of the `lua` port.
   a. This remains true even if running `luarocks-5.n` because the versioned copies are all symlinks to the same `luarocks` script.
 . `luarocks` always manages packages in `/opt/local/share/lua/5.3` because this value is hard-coded in the script.
-. Building `neovim` is breaking because it links against the `lua.h` provided by the `lua` port (currently 5.3), which is incompatible with neovim and luajit (not for any reasons having to do with `luarocks`).