diff --git a/.github/workflows/build_pyodide.yml b/.github/workflows/build_pyodide.yml
index 2ad24b529e..89e0d37701 100644
--- a/.github/workflows/build_pyodide.yml
+++ b/.github/workflows/build_pyodide.yml
@@ -14,15 +14,6 @@ jobs:
           submodules: recursive
           path: IfcOpenShell
 
-      - name: Checkout Pyodide
-        uses: actions/checkout@v3
-        with:
-          submodules: recursive
-          repository: pyodide/pyodide
-          ref: '0.28.0a3'
-          token: ${{ secrets.BUILD_REPO_TOKEN }}
-          path: pyodide
-
       - name: Checkout Build Repository
         uses: actions/checkout@v3
         with:
@@ -39,12 +30,9 @@ jobs:
 
       - name: Build
         run: |
-          VERSION=`cat IfcOpenShell/VERSION`
-          sed -i s/0.8.0/$VERSION/g IfcOpenShell/pyodide/meta.yaml
-          sed -i s/--tty// pyodide/run_docker
-          pyodide/run_docker IfcOpenShell/pyodide/build_pyodide.sh
+          ./IfcOpenShell/pyodide/build_pyodide.sh
           FILE=`echo dist/ifcopenshell-*.whl`
-          NEW_FILE=`echo $FILE | sed "s/$VERSION/$VERSION+${GITHUB_SHA:0:7}/"`
+          NEW_FILE=`echo $FILE | sed "s/-/+${GITHUB_SHA:0:7}-/2"`
           mv $FILE $NEW_FILE
 
       - name: Upload Build Logs
diff --git a/pyodide/README.md b/pyodide/README.md
index 4d9de6f408..120be3281b 100644
--- a/pyodide/README.md
+++ b/pyodide/README.md
@@ -3,8 +3,8 @@ There are two ways to build pyodide ifcopenshell Python wrapper wheel.
 
 1. Using pyodide build system (`build_pyodide.yml` does it):
 
-- setup pyodide environment in `pyodide_root` folder - either by using image or build it from source - see https://pyodide.org/en/stable/development/building-from-sources.html
-- clone IfcOpenShell repo next to it to `IfcOpenShell` folder
+- install prebuilt pyodide build and emscripten environment (see `build_pyodide.sh`)
+- clone IfcOpenShell to `IfcOpenShell` folder
 - create `packages/ifcopenshell` folder that will be used by pyodide build system
 - from `IfcOpenShell` move building recipe `pyodide/meta.yaml` to `packages/ifcopenshell`
 - run `pyodide build-recipes ifcopenshell --install`, it will
@@ -19,12 +19,12 @@ There are two ways to build pyodide ifcopenshell Python wrapper wheel.
         - copy the wheel next to `dist` folder (in root directory, next to `packages`)
         - add wheel to `dist/pyodide-lock.json`
 
-2. Build it outside of pyodide system.
+2. Build it outside of pyodide build system.
 
 Building inside pyodide build system should be preferred, option to build it outside is useful for debugging purposes,
 since it's pure cmake without any additional moving parts.
 
-- setup pyodide environment in `pyodide_root` folder, see above
+- setup pyodide environment, see above
 - clone IfcOpenShell repo next to it to `IfcOpenShell` folder
 - setup debug build environment using `source pyodide/debug_build_env.sh /path/to/pyodide_root`
 - run `python nix/build-all.py -wasm -py-313` in `IfcOpenShell`
diff --git a/pyodide/build_pyodide.sh b/pyodide/build_pyodide.sh
index dabe69d972..2994a44ae6 100755
--- a/pyodide/build_pyodide.sh
+++ b/pyodide/build_pyodide.sh
@@ -1,17 +1,36 @@
 #!/usr/bin/bash
-set -e
-cd pyodide
-make
-cd ..
+set -ex
+
+# Install uv.
+curl -LsSf https://astral.sh/uv/install.sh | sh
+uv venv --python 3.13
+source .venv/bin/activate
+
+# Install pyodide cross build environment.
+# Instructions: https://pyodide.org/en/stable/development/building-packages.html
+uv pip install pyodide-build
+# `uv run` is required, so xbuildenv would skip using `pip`.
+uv run pyodide xbuildenv install
+
+# Emscripten doesn't come with xbuildenv.
+git clone https://github.com/emscripten-core/emsdk
+pushd emsdk
+PYODIDE_EMSCRIPTEN_VERSION=$(pyodide config get emscripten_version)
+./emsdk install ${PYODIDE_EMSCRIPTEN_VERSION}
+./emsdk activate ${PYODIDE_EMSCRIPTEN_VERSION}
+source emsdk_env.sh
+which emcc
+popd
+
 mkdir -p packages/ifcopenshell
+VERSION=`cat IfcOpenShell/VERSION`
 cp IfcOpenShell/pyodide/meta.yaml packages/ifcopenshell
-# Required, otherwise pyodide will create new temp pyodide environment.
-export PYODIDE_ROOT=/src/pyodide
-# Ensure emsdk tools are in PATH.
-export PATH=$PYODIDE_ROOT/emsdk/emsdk:$PYODIDE_ROOT/emsdk/emsdk/node/22.16.0_64bit/bin:$PYODIDE_ROOT/emsdk/emsdk/upstream/emscripten:$PATH
+sed -i s/0.8.0/$VERSION/g packages/ifcopenshell/meta.yaml
+
 # Use custom build ifcopenshell directory in build-all to make caching simpler
 # Otherwise pyodide build path typically includes package version, so cached cmake configs might break.
-export BUILD_DIR=/src/ifcopenshell_build
+export BUILD_DIR=`readlink -f ifcopenshell_build`
+
 # Use build-recipes-no-deps first, so logs would be printed to stdout.
 pyodide build-recipes-no-deps ifcopenshell
 pyodide build-recipes ifcopenshell --install