You can download 3.11.0b5 builds from the release page. The repo also contains some instructions how to run the builds. The release bundles are self-contained and come with a subset of Python’s stdlib.
And for people who would just like to test if their modules can build/run or compile them with mypyc under wasm emscripten ( not wasi ! use tiran’s link for that ) : the prebuilts (emsdk+cpython+lots of common system libraries) used to build pygame are available here : Releases · pygame-web/python-wasm-sdk · GitHub
nb : use Ubuntu 22.04 and unpack in /
ctypes enabled, no threads, backward compatible to chromium 81.0.4044 ( android kitkat 4.4 )
the shortcut is : /opt/python-wasm-sdk/python3-wasm
eg to build a wheel /opt/python-wasm-sdk/python3-wasm setup.py bdist_wheel
Nightly WASI builds are now passing again. Christian also changed things so that as long as the specified, stable wasmtime passes then the built versions get uploaded.