diff --git a/.github/workflows/ci-mameui.yml b/.github/workflows/ci-mameui.yml
index d142454e6e9..56be15e118e 100644
--- a/.github/workflows/ci-mameui.yml
+++ b/.github/workflows/ci-mameui.yml
@@ -7,7 +7,7 @@ jobs:
   build-windows-gcc:
     runs-on: windows-latest
     concurrency:
-      group: ci-${{ github.ref }}
+      group: ${{ github.ref }}
       cancel-in-progress: true
     defaults:
       run:
@@ -20,10 +20,7 @@ jobs:
     - name: Build
       env:
         MINGW64: "/mingw64"
-        OSD: "messui"
         PTR64: "1"
-        CC:   gcc-10
-        CXX:  g++-10
       run: make -j2 PTR64=1 OSD=messui DEPRECATED=0 SYMBOLS=0 NO_SYMBOLS=1
     - name: Validate
       run: ./mameui -validate