diff --git a/.github/workflows/ci_cd_nightly.yml b/.github/workflows/ci_cd_nightly.yml
index fbebf836..d03065e5 100644
--- a/.github/workflows/ci_cd_nightly.yml
+++ b/.github/workflows/ci_cd_nightly.yml
@@ -6,7 +6,7 @@ on:
     - cron: "0 3 * * *"
 
 env:
-  MAIN_PYTHON_VERSION: '3.9'
+  MAIN_PYTHON_VERSION: '3.10'
   DEV_MAJOR_REV: '25'
   DEV_MINOR_REV: '1'
   DEV_REV: '25.1_candidate'
@@ -72,7 +72,7 @@ jobs:
     name: Documentation building
     runs-on: public-ubuntu-latest-8-cores
     needs: ['saving-image-versions']
-    timeout-minutes: 30
+    timeout-minutes: 60
     container:
       image:  ${{ needs.saving-image-versions.outputs.dev_docker_image_version }}
       options: --entrypoint /bin/bash
@@ -83,30 +83,22 @@ jobs:
       - name: Set up Python
         run: |
           apt update
-          apt install -y python3.9 python3-pip
-          ln -s /usr/bin/python3.9 /usr/bin/python
-          python -m pip install --upgrade pip
-          python --version
-          pip3 --version
-
-      - name: Install system dependencies
-        run: |
-          apt update
-          apt install -y make
+          apt install --reinstall ca-certificates
+          apt install lsb-release xvfb software-properties-common make -y
+          add-apt-repository ppa:deadsnakes/ppa -y
+          apt install -y python${{ env.MAIN_PYTHON_VERSION }} python${{ env.MAIN_PYTHON_VERSION }}-venv
+          python${{ env.MAIN_PYTHON_VERSION }} -m venv /env
+          apt install --reinstall ca-certificates
+          apt install lsb-release xvfb software-properties-common make -y
+          add-apt-repository ppa:deadsnakes/ppa -y
+          apt install -y python${{ env.MAIN_PYTHON_VERSION }} python${{ env.MAIN_PYTHON_VERSION }}-venv
+          python${{ env.MAIN_PYTHON_VERSION }} -m venv /env
 
       - name: Install Python requirements
         run: |
-          pip3 install -r requirements/requirements_doc.txt
-
-      - name: Retrieve PyMechanial version
-        run: |
-          echo "PYMECHANICAL_VERSION=$(python -c 'from ansys.mechanical.core import __version__; print(__version__)')" >> $GITHUB_ENV
-          echo "PyMechanical version is: $(python -c "from ansys.mechanical.core import __version__; print(__version__)")"
-        id: version
-
-      - name: Find Mechanical version
-        run: |
-          find-mechanical
+          . /env/bin/activate
+          pip install --upgrade pip
+          pip install -r requirements/requirements_doc.txt
 
       - name: Update PyMechanical version in examples for 251
         run: |
@@ -116,10 +108,10 @@ jobs:
         env:
           SPHINXOPTS: '-j auto'
           LICENSE_SERVER: ${{ secrets.LICENSE_SERVER }}
-          ANSYSCL242_DIR: /install/ansys_inc/v${{ needs.saving-image-versions.outputs.major }}${{ needs.saving-image-versions.outputs.minor }}/licensingclient
           ANSYSLMD_LICENSE_FILE: 1055@${{ secrets.LICENSE_SERVER }}
           ANSYS_WORKBENCH_LOGGING_FILTER_LEVEL: 0
         run: |
+          . /env/bin/activate
           xvfb-run mechanical-env make -C doc html > doc_build_output.txt 2>&1 || true
           cat doc_build_output.txt
           #