And it seems that xmake is well maintained on termux: https://github.com/termux/termux-packages/commits/master/packages/xmake/build.sh
File locks in TeXmacs
The issue is about packaging — Termux does not support xmake in the packaging system. Termux is not an independent system, and it seems that there are scripts to analyze and determine how to properly install the compiled binary into Termux.