diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index adb18dc..ddfa077 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -52,7 +52,7 @@ jobs:
         with:
           version: ${{ matrix.qt-version }}
           host: ${{ matrix.os-name }}
-          modules: ${{join({(startsWith(matrix.qt-version, '6') && 'qt5compat ' || ''), 'qtmultimedia'}, ' ')}}
+          modules: ${{format('qtmultimedia {0}', (startsWith(matrix.qt-version, '6') && ' qt5compat' || ''))}}
           arch: ${{ matrix.mingw-short-version != '' && format('win32_mingw{0}', matrix.mingw-short-version) || '' }}
           tools: ${{ matrix.mingw-short-version != '' && format('tools_mingw,qt.tools.win32_mingw{0}0', matrix.mingw-short-version) || '' }}