Fix

Author: govindchari

.github/workflows/build.yml

@@ -57,14 +57,37 @@ jobs:
             C:\Users\runneradmin\AppData\Local\pypa\cibuildwheel\Cache
           key: cibuildwheel-${{ runner.os }}
 
-      - name: Install virtualenv
-        run: python -m pip install virtualenv
+      # Pre-download virtualenv for macOS
+      - name: Pre-download virtualenv (macOS)
+        if: runner.os == 'macOS'
+        run: |
+          mkdir -p ~/Library/Caches/cibuildwheel
+          curl -L -H "Authorization: Bearer $GITHUB_TOKEN" \
+            https://github.com/pypa/get-virtualenv/raw/20.26.6/public/virtualenv.pyz \
+            -o ~/Library/Caches/cibuildwheel/virtualenv-20.26.6.pyz
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      # Pre-download virtualenv for Windows
+      - name: Pre-download virtualenv (Windows)
+        if: runner.os == 'Windows'
+        shell: pwsh
+        run: |
+          $cache = "$env:LOCALAPPDATA\pypa\cibuildwheel\Cache"
+          New-Item -ItemType Directory -Force -Path $cache
+          Invoke-WebRequest `
+            -Headers @{Authorization="Bearer $env:GITHUB_TOKEN"} `
+            -Uri "https://github.com/pypa/get-virtualenv/raw/20.26.6/public/virtualenv.pyz" `
+            -OutFile "$cache\virtualenv-20.26.6.pyz"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build wheels
         uses: pypa/cibuildwheel@v2.21
         env:
           CIBW_SKIP: "pp38-*"
           CIBW_BUILD_VERBOSITY: 1
+
       - name: Upload wheels
         uses: actions/upload-artifact@v4
         with: