diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 607116b5..fb9ec582 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -115,29 +115,32 @@ jobs:
       shell: bash
       run: |
         git clone --depth=1 https://github.com/madler/zlib.git zlib && cd zlib
-        cmake -B build -A Win32 -DCMAKE_BUILD_TYPE=Release -DZLIB_BUILD_TESTING=OFF -DZLIB_BUILD_SHARED=OFF -DZLIB_BUILD_MINIZIP=OFF -DZLIB_INSTALL_COMPAT_DLL=OFF
-        cmake --build build --config Release
-        cmake -E rename build/Release/zs.lib zlib.lib
+        cmake -B build -A Win32 -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DZLIB_BUILD_TESTING=OFF -DZLIB_BUILD_SHARED=OFF -DZLIB_BUILD_MINIZIP=OFF -DZLIB_INSTALL_COMPAT_DLL=OFF
+        cmake --build build --config $BUILD_TYPE
+        cmake -E rename build/$BUILD_TYPE/zs.lib zlib.lib
         cmake -E rename build/zconf.h zconf.h
 
     - name: Install libpng
       shell: bash
       run: |
         git clone --depth=1 https://git.code.sf.net/p/libpng/code lpng && cd lpng
-        cmake -B build -A Win32 -DCMAKE_BUILD_TYPE=Release -DPNG_SHARED=OFF -DPNG_TESTS=OFF -DPNG_TOOLS=OFF -DZLIB_ROOT="../zlib"
-        cmake --build build --config Release
-        cmake -E rename build/Release/libpng16_static.lib libpng.lib
+        cmake -B build -A Win32 -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DPNG_SHARED=OFF -DPNG_TESTS=OFF -DPNG_TOOLS=OFF -DZLIB_ROOT="{$GITHUB_WORKSPACE}/zlib"
+        cmake --build build --config $BUILD_TYPE
+        cmake -E rename build/$BUILD_TYPE/libpng16_static.lib libpng.lib
         cmake -E rename build/pnglibconf.h pnglibconf.h
-        echo "GITHUB_WORKSPACE: $GITHUB_WORKSPACE"
-        ls $GITHUB_WORKSPACE
+
+    - name: Install GS1 Syntax Engine
+      run: |
+        git clone --depth=1 https://github.com/gitlost/gs1-syntax-engine && cd gs1-syntax-engine/src/c-lib
+        cmake WIN32 -B build -A Win32
+        cmake --build build --config $BUILD_TYPE
+        cmake -E rename build/$BUILD_TYPE/gs1encoders.lib gs1encoders.lib
 
     - name: Configure CMake
       working-directory: build
       shell: bash
       run: |
-        echo "GITHUB_WORKSPACE: ${GITHUB_WORKSPACE}"
-        ls $GITHUB_WORKSPACE
-        cmake $GITHUB_WORKSPACE -A Win32 -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DZINT_TEST=ON -DZINT_STATIC=ON -DZINT_USE_QT=OFF -DZLIB_ROOT="${GITHUB_WORKSPACE}/zlib" -DPNG_ROOT="${GITHUB_WORKSPACE}/lpng"
+        cmake $GITHUB_WORKSPACE -A Win32 -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DZINT_TEST=ON -DZINT_STATIC=ON -DZINT_USE_QT=OFF -DZLIB_ROOT="${GITHUB_WORKSPACE}/zlib" -DPNG_ROOT="${GITHUB_WORKSPACE}/lpng" -DGS1SE_PATH="%{GITHUB_WORKSPACE}/gs1-syntax-engine/src/c-lib"
 
     - name: Build
       working-directory: build
@@ -147,7 +150,7 @@ jobs:
     - name: Test
       working-directory: build
       shell: bash
-      run: PATH=$PATH:"$(pwd)/backend/Release:$(pwd)/frontend/Release" ctest -V -C $BUILD_TYPE
+      run: PATH=$PATH:"$(pwd)/backend/$BUILD_TYPE:$(pwd)/frontend/$BUILD_TYPE" ctest -V -C $BUILD_TYPE
 
   build-windows-64bit:
     runs-on: windows-latest
@@ -163,24 +166,24 @@ jobs:
       shell: bash
       run: |
         git clone --depth=1 https://github.com/madler/zlib.git zlib && cd zlib
-        cmake -B build -DCMAKE_BUILD_TYPE=Release -DZLIB_BUILD_TESTING=OFF -DZLIB_BUILD_SHARED=OFF -DZLIB_BUILD_MINIZIP=OFF -DZLIB_INSTALL_COMPAT_DLL=OFF
-        cmake --build build --config Release
-        cmake -E rename build/Release/zs.lib zlib.lib
+        cmake -B build -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DZLIB_BUILD_TESTING=OFF -DZLIB_BUILD_SHARED=OFF -DZLIB_BUILD_MINIZIP=OFF -DZLIB_INSTALL_COMPAT_DLL=OFF
+        cmake --build build --config $BUILD_TYPE
+        cmake -E rename build/$BUILD_TYPE/zs.lib zlib.lib
         cmake -E rename build/zconf.h zconf.h
 
     - name: Install libpng
       shell: bash
       run: |
         git clone --depth=1 https://git.code.sf.net/p/libpng/code lpng && cd lpng
-        cmake -B build -DCMAKE_BUILD_TYPE=Release -DPNG_SHARED=OFF -DPNG_TESTS=OFF -DPNG_TOOLS=OFF -DZLIB_ROOT="../zlib"
-        cmake --build build --config Release
-        cmake -E rename build/Release/libpng16_static.lib libpng.lib
+        cmake -B build -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DPNG_SHARED=OFF -DPNG_TESTS=OFF -DPNG_TOOLS=OFF -DZLIB_ROOT="{$GITHUB_WORKSPACE}/zlib"
+        cmake --build build --config $BUILD_TYPE
+        cmake -E rename build/$BUILD_TYPE/libpng16_static.lib libpng.lib
         cmake -E rename build/pnglibconf.h pnglibconf.h
 
     - name: Configure CMake
       working-directory: build
       shell: bash
-      run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DZINT_TEST=ON -DZINT_STATIC=ON -DZINT_USE_QT=OFF -DZLIB_ROOT="../zlib" -DPNG_ROOT="../lpng"
+      run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DZINT_TEST=ON -DZINT_STATIC=ON -DZINT_USE_QT=OFF -DZLIB_ROOT="{$GITHUB_WORKSPACE}/zlib" -DPNG_ROOT="{$GITHUB_WORKSPACE}/lpng"
 
     - name: Build
       working-directory: build
@@ -190,7 +193,7 @@ jobs:
     - name: Test
       working-directory: build
       shell: bash
-      run: PATH=$PATH:"$(pwd)/backend/Release:$(pwd)/frontend/Release" ctest -V -C $BUILD_TYPE
+      run: PATH=$PATH:"$(pwd)/backend/$BUILD_TYPE:$(pwd)/frontend/$BUILD_TYPE" ctest -V -C $BUILD_TYPE
 
   build-macOS:
     runs-on: macOS-latest