diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3ce16ba..e09df7e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -7,10 +7,10 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        version: ['1.20']
+        version: ['1.21rc1']
         pyver: ['3.8', '3.9', '3.10', '3.11']
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Build
         run: docker pull openturns/archlinux-mingw && docker run -e MAKEFLAGS='-j2' -v `pwd`:/io openturns/archlinux-mingw /io/run_docker_build.sh ${{ matrix.version }} ${{ matrix.pyver }} `id -u` `id -g`
       - name: Release
diff --git a/run_docker_build.sh b/run_docker_build.sh
index 1b8b558..70f94d5 100755
--- a/run_docker_build.sh
+++ b/run_docker_build.sh
@@ -24,9 +24,9 @@ curl -L https://github.com/openturns/openturns/archive/v${VERSION}.tar.gz | tar
 PREFIX=$PWD/install
 ${ARCH}-w64-mingw32-cmake \
   -DCMAKE_INSTALL_PREFIX=${PREFIX} \
-  -DPYTHON_INCLUDE_DIR=${MINGW_PREFIX}/include/python${PYMAJMIN} \
-  -DPYTHON_LIBRARY=${MINGW_PREFIX}/lib/libpython${PYMAJMIN}.dll.a \
-  -DPYTHON_EXECUTABLE=/usr/bin/${ARCH}-w64-mingw32-python${PYMAJMIN}-bin \
+  -DPython_INCLUDE_DIR=${MINGW_PREFIX}/include/python${PYMAJMIN} \
+  -DPython_LIBRARY=${MINGW_PREFIX}/lib/libpython${PYMAJMIN}.dll.a \
+  -DPython_EXECUTABLE=/usr/bin/${ARCH}-w64-mingw32-python${PYMAJMIN}-bin \
   -DUSE_SPHINX=OFF \
   -DCMAKE_UNITY_BUILD=ON -DCMAKE_UNITY_BUILD_BATCH_SIZE=32 \
   -DSWIG_COMPILE_FLAGS="-O1" \