diff --git a/.github/workflows/smoketest-build.yml b/.github/workflows/smoketest-build.yml
index 20588447..55ca5e4d 100644
--- a/.github/workflows/smoketest-build.yml
+++ b/.github/workflows/smoketest-build.yml
@@ -13,6 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [windows-latest, ubuntu-latest, macos-latest]
+        dotnet-ver: ['8.0.x', '6.12.0'] # 6.0.x is the latest version available for .Net Mono
 
     runs-on: ${{ matrix.os }}
 
@@ -25,7 +26,7 @@ jobs:
       - name: Setup .NET
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: '8.0.x'
+          dotnet-version: ${{ matrix.dotnet-ver }}
 
       - name: Build solution
         run: dotnet build