diff --git a/.github/workflows/ci_build.yml b/.github/workflows/ci_build.yml
index d5b25d47c..cb8ec11d2 100644
--- a/.github/workflows/ci_build.yml
+++ b/.github/workflows/ci_build.yml
@@ -172,3 +172,99 @@ jobs:
         name: macos-amd64-failure
         path: ${{github.workspace}}/build/
         compression-level: 9 # maximum compression
+
+  # ----------------------------------------------------------------------------------------------
+  cygwin-amd64:
+    name: Cygwin (amd64/x86_64)
+    runs-on: windows-latest
+    env:
+      CYGWIN_NOWINPATH: 1 # isolate cygwin from windows
+    defaults:
+      run:
+        shell: C:\cygwin\bin\bash.EXE --login -e -o pipefail -o igncr '{0}'
+    steps:
+    - name: Avoid '\r' problems
+      shell: cmd
+      run: git config --global core.autocrlf input
+
+    - uses: actions/checkout@v4
+
+    - name: Install dependencies with Cygwin
+      uses: cygwin/cygwin-install-action@master
+      with:
+        packages: git curl p7zip cmake make gcc-core # FIXME using the libelf-devel package gets you a "missing libintl_dgettext" error, how to fix?
+        platform: x86_64
+        add-to-path: false
+
+    - name: Adapt cygwin environment
+      run: |
+        set -x
+        # avoid git error "detected dubious ownership"
+        git config --global --add safe.directory '*'
+        # set the start directory
+        echo "cd '${{github.workspace}}'" >> ~/.bash_profile
+
+    - name: Install dependencies (libelf)
+      run: |
+        set -x
+        curl -O https://fossies.org/linux/misc/old/libelf-0.8.13.tar.gz
+        tar xvzf libelf-0.8.13.tar.gz
+        cd libelf-0.8.13
+        ./configure --host x86_64-pc-cygwin
+        make
+        make install
+
+    - name: Install dependencies (winpcap SDK)
+      run: |
+        set -x
+        curl -O https://www.winpcap.org/install/bin/WpdPack_4_1_2.zip
+        7za x ./WpdPack_4_1_2.zip -o.
+        cp ./WpdPack/Lib/x64/Packet.lib /usr/local/lib/libpacket.a
+        cp ./WpdPack/Lib/x64/wpcap.lib /usr/local/lib/libwpcap.a
+        cp --verbose --force --recursive ./WpdPack/Include/* /usr/local/include/
+
+    - name: Install dependencies (win10pcap)
+      shell: cmd
+      run: |
+        echo on
+        curl -O "http://www.win10pcap.org/download/Win10Pcap-v10.2-5002.msi"
+        msiexec /i "Win10Pcap-v10.2-5002.msi" /qn /norestart /L*v "Win10Pcap-install.log"
+        type "Win10Pcap-install.log"
+
+    - name: Configure with CMake
+      run: cmake -B $(pwd)/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} -DDYNAMIPS_CODE=both -DBUILD_UDP_RECV=ON -DBUILD_UDP_SEND=ON -DCMAKE_INSTALL_PREFIX=$(pwd)/build/install -DCPACK_PACKAGE_FILE_NAME=dynamips-package -DCPACK_GENERATOR=ZIP
+
+    - name: Build
+      run: cmake --build $(pwd)/build --config ${{env.BUILD_TYPE}}
+
+    - name: Test
+      run: |
+        set -x
+        cd build
+        ctest --verbose --build-config ${{env.BUILD_TYPE}}
+        ./stable/dynamips -e
+        ./unstable/dynamips_amd64_unstable -e
+
+    - name: Install
+      run: cmake --build $(pwd)/build --config ${{env.BUILD_TYPE}} --target install
+
+    - name: Package
+      run: cmake --build $(pwd)/build --config ${{env.BUILD_TYPE}} --target package
+
+    - name: Upload success
+      if: ${{ success() }}
+      uses: actions/upload-artifact@v4
+      with:
+        name: cygwin-amd64-success
+        path: |
+          ${{github.workspace}}/build/install/
+          ${{github.workspace}}/build/dynamips-package.zip
+        compression-level: 9 # maximum compression
+
+    - name: Upload failure
+      if: ${{ failure() }}
+      uses: actions/upload-artifact@v4
+      with:
+        name: cygwin-amd64-failure
+        path: ${{github.workspace}}/build/
+        compression-level: 9 # maximum compression