diff --git a/.github/workflows/CI-cygwin.yml b/.github/workflows/CI-cygwin.yml
index d9bf614c1..8ed6a62d2 100644
--- a/.github/workflows/CI-cygwin.yml
+++ b/.github/workflows/CI-cygwin.yml
@@ -16,7 +16,8 @@ jobs:
       matrix:
         os: [windows-2019]
         arch: [x64, x86]
-        packages: 'gcc-g++-11.3.0-1'
+        packages: |
+          'gcc-g++-11.3.0-1'
       fail-fast: false
 
     runs-on: ${{ matrix.os }}