diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 1b529f9ef5..663d38f3a6 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -8,47 +8,22 @@ on:
       - v12-branch
   # All pull_requests trigger a retest.
   pull_request:
+  workflow_dispatch:
 
 jobs:
 
-  mac:
-    strategy:
-      fail-fast: false
-    runs-on: macos-latest
-    name: '🍏 macOS'
-    steps:
-
-    - uses: actions/checkout@v2
-
-    - name: Install dependencies
-      run: |
-        brew install bison
-
-    - name: Build, check and install
-      run: |
-        export PATH="/usr/local/opt/bison/bin:$PATH"
-        autoconf
-        ./configure
-        make check
-        sudo make install
-
-    - name: Test
-      run: ./.github/test.sh
-
-
   lin:
     strategy:
       fail-fast: false
       matrix:
         os: [
-          '20.04',
           '22.04'
         ]
     runs-on: ubuntu-${{ matrix.os }}
     name: '🐧 Ubuntu ${{ matrix.os }}'
     steps:
 
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
 
     - name: Install dependencies
       run: |
@@ -58,62 +33,13 @@ jobs:
     - name: Build, check and install
       run: |
         autoconf
-        ./configure
+        ./configure --prefix=$PWD/inst
         make check
-        sudo make install
-
-    - name: Test
-      run: ./.github/test.sh
-
-    - name: Documentation
-      run: |
-        cd Documentation
-        make html
-
-  win:
-    runs-on: windows-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        include: [
-          { msystem: MINGW64, arch: x86_64 },
-          { msystem: MINGW32, arch: i686 }
-        ]
-    name: 🟪 ${{ matrix.msystem}} · ${{ matrix.arch }}
-    defaults:
-      run:
-        shell: msys2 {0}
-    env:
-      MINGW_ARCH: ${{ matrix.msystem }}
-    steps:
-
-    - run: git config --global core.autocrlf input
-      shell: bash
-
-    - uses: actions/checkout@v2
-
-    - uses: msys2/setup-msys2@v2
-      with:
-        msystem: ${{ matrix.msystem }}
-        update: true
-        install: >
-          git
-          base-devel
-          gperf
-          mingw-w64-${{ matrix.arch }}-toolchain
-
-    - name: Build and check
-      run: |
-        cd msys2
-        makepkg-mingw --noconfirm --noprogressbar -sCLf
-
-    - name: Install
-      run: pacman -U --noconfirm msys2/*.zst
-
-    - name: Test
-      run: ./.github/test.sh
+        make install
+        tar zcf iverilog.tar.gz inst
 
-    - uses: actions/upload-artifact@v2
+    - name: Upload artifact
+      uses: actions/upload-artifact@v3
       with:
-        name: ${{ matrix.msystem }}-${{ matrix.arch }}
-        path: msys2/*.zst
+        name: ${{ matrix.os }} build
+        path: iverilog.tar.gz