Lumen is an alternative BEAM Implementation.
Warning that this is still at a very early stage. It promises the ability to build WebAssembly
I am not currently interested in using Rust to build it from sources, but there are now images published here
https://github.com/lumen/lumen/releases
I used the following to install the tarball (I use a mac):
sudo tar xf lumen-0.1.0-nightly-x86_64-apple-darwin.tar.gz -C /opt
This deploys the bundle to: /opt/lumen
The compiler is now available at: /opt/lumen/bin/lumen
Here are more details on lumen: https://getlumen.org/