diff --git a/.github/workflows/swift-toolchain.yml b/.github/workflows/swift-toolchain.yml
index 7e6a68a5..cd0cfb6e 100644
--- a/.github/workflows/swift-toolchain.yml
+++ b/.github/workflows/swift-toolchain.yml
@@ -681,6 +681,10 @@ jobs:
           path: ${{ github.workspace }}/SourceCache/swift
           show-progress: false
 
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.9'
+
       - name: Configure Tools
         run: |
           $LLVM_EXTERNAL_SWIFT_SOURCE_DIR = cygpath -m ${{ github.workspace }}/SourceCache/swift
@@ -1170,6 +1174,9 @@ jobs:
           }
 
       - uses: actions/setup-python@v5
+        with:
+          python-version: '3.9'
+
       - uses: jannekem/run-python-script-action@v1
         with:
           script: |
@@ -1682,6 +1689,10 @@ jobs:
           ndk-version: ${{ inputs.ANDROID_NDK_VERSION }}
           local-cache: true
 
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.9'
+
       - name: Configure LLVM
         if: matrix.os != 'Android' || inputs.build_android
         run: |
@@ -2123,6 +2134,10 @@ jobs:
           setup-vs-dev-env: ${{ matrix.os == 'Windows' }}
           host-arch: ${{ matrix.arch }}
 
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.9'
+
       - name: Compute workspace hash
         if: matrix.os != 'Android' || inputs.build_android
         id: workspace_hash
@@ -3457,6 +3472,9 @@ jobs:
           cmake --build ${{ github.workspace }}/BinaryCache/libdispatch --target install
 
       - uses: actions/setup-python@v5
+        with:
+          python-version: '3.9'
+
       - uses: jannekem/run-python-script-action@v1
         if: matrix.os != 'Android' || inputs.build_android
         with: