diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 4c8bc76254..3bbe2f0fc7 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -213,6 +213,12 @@ jobs:
           core.exportVariable('VCPKG_BINARY_SOURCES', "clear;x-gha,readwrite");
           core.exportVariable('VCPKG_ROOT', process.env.VCPKG_INSTALLATION_ROOT || '');
 
+    - name: Setup PIP_CONSTRAINTS (workaround https://github.com/python-cffi/cffi/issues/117)
+      if: matrix.options.py == 'ON' && matrix.check_mkvk != 'ONLY'
+      run:
+          echo 'setuptools<74' > $env:BUILD_DIR/constraint.txt
+          echo "PIP_CONSTRAINT=$env:BUILD_DIR/constraint.txt" >> $env:GITHUB_ENV
+
     - name: Install Dependencies
       if: matrix.check_mkvk != 'ONLY'
       # This script only installs what's needed by ON FEATUREs.