diff --git a/.github/workflows/build_viewer.yml b/.github/workflows/build_viewer.yml
index f1ec69928d..1b65b9e791 100644
--- a/.github/workflows/build_viewer.yml
+++ b/.github/workflows/build_viewer.yml
@@ -69,7 +69,7 @@ jobs:
         run: |
           apt-get update
           DEBIAN_FRONTEND=noninteractive apt-get install -y \
-            python3.11 python3.11-venv python3-pip
+            python3.11 python3.11-venv python3-pip python-is-python3
           python3.11 -m pip install --upgrade pip setuptools wheel
           echo "python-path=$(command -v python3.11)" >> "$GITHUB_OUTPUT"
       # Use setup-python for all other jobs