diff --git a/.github/workflows/pyodide.yml b/.github/workflows/pyodide.yml
index 215405b2ef..b489072ff7 100644
--- a/.github/workflows/pyodide.yml
+++ b/.github/workflows/pyodide.yml
@@ -34,7 +34,7 @@ jobs:
       run:  git clone https://github.com/emscripten-core/emsdk.git ~/emsdk && cd ~/emsdk && PYODIDE_EMSCRIPTEN_VERSION=$(~/env/bin/pyodide config get emscripten_version) && ./emsdk install ${PYODIDE_EMSCRIPTEN_VERSION} && ./emsdk activate ${PYODIDE_EMSCRIPTEN_VERSION}
          
     - name: Build Z3
-      run: source ~/emsdk/emsdk_env.sh && cd src/api/python && CFLAGS="-fexceptions -s PTHREAD_POOL_SIZE=0 -s PTHREAD_POOL_SIZE_STRICT=0 -s MODULARIZE=1 -pthread-s WASM_BIGINT -s USE_PTHREADS=1" LDFLAGS="-fexceptions" ~/env/bin/pyodide build --exports whole_archive
+      run: source ~/emsdk/emsdk_env.sh && cd src/api/python && CFLAGS="-fexceptions 0 -s MODULARIZE=1 -pthread -s WASM_BIGINT -s USE_PTHREADS=1" LDFLAGS="-fexceptions" ~/env/bin/pyodide build --exports whole_archive
          
     - name: Setup env-pyodide
       run: source ~/env/bin/activate && source ~/emsdk/emsdk_env.sh && pyodide venv ~/env-pyodide