According to people on the zdoom forum this isn't working properly.

Since it isn't part of the other yml file it causes more trouble than it solves.

.github/workflows/appimage.yml

@@ -1,53 +0,0 @@
-name: App Image
-
-on: [push, pull_request]
-
-jobs:
-  build-appimage:
-    name: Linux Clang 12 | AppImage
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v3
-      - name: Install VKDoom dependencies
-        run: |
-          sudo apt-get update
-          sudo apt-get install clang-12 libsdl2-dev libvpx-dev libwebp-dev cmake -y
-      - name: Install appimage-builder dependencies
-        run: |
-          sudo apt-get install binutils coreutils desktop-file-utils fakeroot fuse libgdk-pixbuf2.0-dev patchelf -y 
-          sudo apt-get install python3-pip python3-setuptools squashfs-tools strace util-linux zsync -y 
-          sudo apt-get install imagemagick-6.q16hdri -y
-      - name: Install appimage-builder
-        run: |
-          python3 -m pip install --upgrade pip
-          pip install appimage-builder
-      - name: Build zmusic dependency
-        run: |
-          git clone -b 1.1.12 https://github.com/ZDoom/ZMusic.git zmusic_build
-          mkdir ./zmusic_build/build
-          cd ./zmusic_build/build
-          cmake -DCMAKE_BUILD_TYPE=Release ..
-          cmake --build .
-          cd ../../
-          mkdir -p ./AppDir/zmusic/lib
-          mkdir ./AppDir/zmusic/include
-          mv ./zmusic_build/build/source/libzmusic* ./AppDir/zmusic/lib/
-          mv ./zmusic_build/include/zmusic.h ./AppDir/zmusic/include/
-      - name: Configure
-        run: cmake -B AppDir -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_PREFIX_PATH=`pwd`/AppDir/zmusic -DPK3_QUIET_ZIPDIR=ON -DCMAKE_C_COMPILER=clang-12 -DCMAKE_CXX_COMPILER=clang++-12 .
-      - name: Build
-        shell: bash
-        run: |
-          export MAKEFLAGS=--keep-going
-          cmake --build AppDir --config Release --parallel `nproc`
-          cp ./AppDir/zmusic/lib/* ./AppDir/
-          mkdir -p ./AppDir/usr/share/icons
-          convert ./src/win32/icon1.ico[0] -flatten ./AppDir/usr/share/icons/game_icon.png
-      - name: Build AppImage
-        run: |
-          appimage-builder --skip-tests
-      - uses: actions/upload-artifact@v2
-        with:
-          name: AppImage
-          path: './*.AppImage*'