[WASI-SDK] CPython 3.14.1 can no longer find systemroot in wasi-libc build (3.13.11 works)

[fatlotus]

Bug report

Bug description:

What works:

$ wget https://github.com/brettcannon/cpython-wasi-build/releases/download/v3.13.11/python-3.13.11-wasi_sdk-24.zip
$ unzip python-3.13.11-wasi_sdk-24.zip
$ cd python-3.13.11-wasi_sdk-24
$ wasmtime --dir . python.wasm    
Python 3.13.11 (tags/v3.13.11-dirty:6278944, Dec  5 2025, 20:41:16) [Clang 18.1.2-wasi-sdk (https://github.com/llvm/llvm-project 26a1d6601d727a96f43 on wasi
Type "help", "copyright", "credits" or "license" for more information.
warning: can't use pyrepl: No module named 'termios'
>>> 

What doesn't:

$ wget https://github.com/brettcannon/cpython-wasi-build/releases/download/v3.14.1/python-3.14.1-wasi_sdk-24.zip
$ unzip python-3.14.1-wasi_sdk-24.zip
$ cd python-3.14.1-wasi_sdk-24
$ wasmtime --dir . python.wasm            
Could not find platform independent libraries <prefix>
Could not find platform dependent libraries <exec_prefix>
Fatal Python error: Failed to import encodings module
Python runtime state: core initialized
ModuleNotFoundError: No module named 'encodings'

Current thread 0x012c0ae8 (most recent call first):
  <no Python frame>

I saw forum thread on https://discuss.python.org/t/wasi-build-of-3-13-0/66979/2 for a prior version, but it appears something has changed in the interim. Or maybe I'm just using it wrong?

Anyway, I'm filing this here because https://github.com/brettcannon/cpython-wasi-build doesn't have the issue tracker enabled. (So heads up for @brettcannon in case you're also subscribed to the main CPython repository!)

CPython versions tested on:

3.14

Operating systems tested on:

macOS

[brettcannon]

I turned on issues at https://github.com/brettcannon/cpython-wasi-build , so please open an issue there.