bootloader build fix

.github/workflows/build.yml

@@ -38,10 +38,11 @@ jobs:
         run: pip install .
 
       - name: Build PyInstaller bootloader from source
-        run: |
-          pip install "pyinstaller==6.13.0" --no-binary pyinstaller
         env:
-          PYINSTALLER_COMPILE_BOOTLOADER: 1
+          PYINSTALLER_COMPILE_BOOTLOADER: "1"
+        run: |
+          pip download --no-binary pyinstaller --no-deps --no-cache-dir -d pyinstaller_src "pyinstaller==6.10.0"
+          pip install (Get-ChildItem pyinstaller_src\*.tar.gz).FullName
 
       - name: Build EXE with PyInstaller
         run: pyinstaller packaging/windows.spec --noconfirm