diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 01b41cd1e..f9dd98312 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -23,7 +23,7 @@ jobs:
     outputs:
       code: ${{ steps.filter.outputs.code == 'true' || github.event_name == 'release' }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: dorny/paths-filter@v4
         id: filter
         if: github.event_name != 'release'
@@ -78,7 +78,7 @@ jobs:
           haskell: true
           large-packages: true
       - uses: hmarr/debug-action@v3
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - name: ccache
         if: matrix.os != 'ubuntu-24.04-arm'
         uses: hendrikmuhs/ccache-action@v1.2
@@ -95,7 +95,7 @@ jobs:
           mkdir -p $HOST_CCACHE_DIR
       - name: Build wheels (ARM)
         if: matrix.os == 'ubuntu-24.04-arm'
-        uses: pypa/cibuildwheel@v3.4.1
+        uses: pypa/cibuildwheel@v4.1.0
         env:
           # override the default CentOS “yum install … ccache” and drop ccache
           CIBW_BEFORE_ALL_LINUX: |
@@ -110,7 +110,7 @@ jobs:
 
       - name: Build wheels (all other platforms)
         if: matrix.os != 'ubuntu-24.04-arm'
-        uses: pypa/cibuildwheel@v3.4.1
+        uses: pypa/cibuildwheel@v4.1.0
         env:
           CIBW_BUILD: ${{ matrix.cibuild }}
           CIBW_ARCHS_MACOS: ${{ matrix.macos-arch }}
@@ -139,7 +139,7 @@ jobs:
     if: needs.changes.outputs.code == 'true'
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
 
     - name: Build SDist
       run: pipx run build --sdist
diff --git a/.github/workflows/cache-maintenance.yml b/.github/workflows/cache-maintenance.yml
index f57190c28..8208d0e97 100644
--- a/.github/workflows/cache-maintenance.yml
+++ b/.github/workflows/cache-maintenance.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Cleanup
         run: |
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 1d653e497..000000000
--- a/.travis.yml
+++ /dev/null
@@ -1,582 +0,0 @@
-branches:
-  only:
-    - /v\d+\.\d+(\.\d+)?(\S*)?$/  # tag format: *v0.25(.8)(dev14)
-    - staging
-    - master
-
-matrix:
-  include:
-    # python manylinux packages
-    - name: "cp39-cp39m-manylinux2014_x86_64.whl"
-      os: linux
-      sudo: true
-      language: python
-      python: '3.9'
-      services:
-        - docker
-      env:
-        - DOCKER_IMAGE="quay.io/pypa/manylinux2014_x86_64"
-        - PY_VERSION="cp39-cp39"
-        - DOCKER_BUILD=true
-        - TEST_IN_HOST=true
-        - MATRIX_EVAL=""
-      cache:
-        directories:
-        - ccache
-
-    - name: "cp38-cp38m-manylinux2014_x86_64.whl"
-      os: linux
-      sudo: true
-      language: python
-      python: '3.8'
-      services:
-        - docker
-      env:
-        - DOCKER_IMAGE="quay.io/pypa/manylinux2014_x86_64"
-        - PY_VERSION="cp38-cp38"
-        - DOCKER_BUILD=true
-        - TEST_IN_HOST=true
-        - MATRIX_EVAL=""
-      cache:
-        directories:
-        - ccache
-
-    - name: "cp37-cp37m-manylinux2014_x86_64.whl"
-      os: linux
-      sudo: true
-      language: python
-      python: '3.7-dev'
-      services:
-        - docker
-      env:
-        - DOCKER_IMAGE="quay.io/pypa/manylinux2014_x86_64"
-        - PY_VERSION="cp37-cp37m"
-        - DOCKER_BUILD=true
-        - TEST_IN_HOST=true
-        - MATRIX_EVAL=""
-      cache:
-        directories:
-        - ccache
-
-    - name: "cp36-cp36m-manylinux2014_x86_64.whl"
-      os: linux
-      sudo: true
-      language: python
-      python: '3.6'
-      services:
-        - docker
-      env:
-        - DOCKER_IMAGE="quay.io/pypa/manylinux2014_x86_64"
-        - PY_VERSION="cp36-cp36m"
-        - DOCKER_BUILD=true
-        - TEST_IN_HOST=true
-        - MATRIX_EVAL=""
-      cache:
-        directories:
-        - ccache
-
-    - name: "cp35-cp35m-manylinux2014_x86_64.whl"
-      os: linux
-      sudo: true
-      language: python
-      python: '3.5'
-      services:
-        - docker
-      env:
-        - DOCKER_IMAGE="quay.io/pypa/manylinux2014_x86_64"
-        - PY_VERSION="cp35-cp35m"
-        - DOCKER_BUILD=true
-        - TEST_IN_HOST=true
-        - MATRIX_EVAL=""
-      cache:
-        directories:
-        - ccache
-
-    - name: "cp27-cp27m-manylinux2014_x86_64.whl"
-      os: linux
-      sudo: true
-      language: python
-      python: '2.7'
-      services:
-        - docker
-      env:
-        - DOCKER_IMAGE="quay.io/pypa/manylinux2014_x86_64"
-        - PY_VERSION="cp27-cp27m"
-        - DOCKER_BUILD=true
-        - TEST_IN_HOST=false  # travis's python 2.7 uses ucs4 (mu), so this test fails.
-        - MATRIX_EVAL=""
-      cache:
-        directories:
-        - ccache
-
-    # python 3 osx
-    
-    # MacOS 10.15
-
-    # MacOS 10.15, Python 3.9
-    - name: "cp39-cp39m-macosx_10_15_x86_64.whl"
-      os: osx
-      osx_image: xcode12  # macOS 10.15
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - python@3.9
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL="shopt -s expand_aliases; alias python='/usr/local/opt/python@3.9/bin/python3'; alias pip='/usr/local/opt/python@3.9/bin/pip3';"
-        - ARCHFLAGS="-std=c++11"
-        - PIP_UPDATE="1"
-        - PYTHON_BUILD=true
-
-    # MacOS 10.15, Python 3.8
-    - name: "cp38-cp38m-macosx_10_15_x86_64.whl"
-      os: osx
-      osx_image: xcode12  # macOS 10.15
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - python@3.8
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL="shopt -s expand_aliases; alias python='/usr/local/opt/python@3.8/bin/python3'; alias pip='/usr/local/opt/python@3.8/bin/pip3';"
-        - ARCHFLAGS="-std=c++11"
-        - PIP_UPDATE="1"
-        - PYTHON_BUILD=true
-
-    # MacOS 10.15, Python 3.7
-    - name: "cp37-cp37m-macosx_10_15_x86_64.whl"
-      os: osx
-      osx_image: xcode12  # macOS 10.15
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - python@3.7
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL="shopt -s expand_aliases; alias python='/usr/local/opt/python@3.7/bin/python3'; alias pip='/usr/local/opt/python@3.7/bin/pip3';"
-        - ARCHFLAGS="-std=c++11"
-        - PIP_UPDATE="1"
-        - PYTHON_BUILD=true
-
-    # MacOS 10.14
-
-    # MacOS 10.14, Python 3.9
-    - name: "cp39-cp39m-macosx_10_14_x86_64.whl"
-      os: osx
-      osx_image: xcode11  # macOS 10.14
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - python@3.9
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL="shopt -s expand_aliases; alias python='/usr/local/opt/python@3.9/bin/python3'; alias pip='/usr/local/opt/python@3.9/bin/pip3';"
-        - ARCHFLAGS="-std=c++11"
-        - PIP_UPDATE="1"
-        - PYTHON_BUILD=true
-
-    # MacOS 10.14, Python 3.8
-    - name: "cp38-cp38m-macosx_10_14_x86_64.whl"
-      os: osx
-      osx_image: xcode11  # macOS 10.14
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - python@3.8
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL="shopt -s expand_aliases; alias python='/usr/local/opt/python@3.8/bin/python3'; alias pip='/usr/local/opt/python@3.8/bin/pip3';"
-        - ARCHFLAGS="-std=c++11"
-        - PIP_UPDATE="1"
-        - PYTHON_BUILD=true
-
-    # MacOS 10.14, Python 3.7
-    - name: "cp37-cp37m-macosx_10_14_x86_64.whl"
-      os: osx
-      osx_image: xcode11  # macOS 10.14
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - python@3.7
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL="shopt -s expand_aliases; alias python='/usr/local/opt/python@3.7/bin/python3'; alias pip='/usr/local/opt/python@3.7/bin/pip3';"
-        - ARCHFLAGS="-std=c++11"
-        - PIP_UPDATE="1"
-        - PYTHON_BUILD=true
-
-    # MacOS 10.13
-
-    # MacOS 10.13, Python 3.9
-    - name: "cp39-cp39m-macosx_10_13_x86_64.whl"
-      os: osx
-      osx_image: xcode10.1  # macOS 10.13
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - python@3.9
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL="shopt -s expand_aliases; alias python='/usr/local/opt/python@3.9/bin/python3'; alias pip='/usr/local/opt/python@3.9/bin/pip3';"
-        - ARCHFLAGS="-std=c++11"
-        - PIP_UPDATE="1"
-        - PYTHON_BUILD=true
-
-    # MacOS 10.13, Python 3.8
-    - name: "cp38-cp38m-macosx_10_13_x86_64.whl"
-      os: osx
-      osx_image: xcode10.1  # macOS 10.13
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - python@3.8
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL="shopt -s expand_aliases; alias python='/usr/local/opt/python@3.8/bin/python3'; alias pip='/usr/local/opt/python@3.8/bin/pip3';"
-        - ARCHFLAGS="-std=c++11"
-        - PIP_UPDATE="1"
-        - PYTHON_BUILD=true
-
-    # MacOS 10.13, Python 3.7
-    - name: "cp37-cp37m-macosx_10_13_x86_64.whl"
-      os: osx
-      osx_image: xcode10.1  # macOS 10.13
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - python@3.7
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL="shopt -s expand_aliases; alias python='/usr/local/opt/python@3.7/bin/python3'; alias pip='/usr/local/opt/python@3.7/bin/pip3';"
-        - ARCHFLAGS="-std=c++11"
-        - PIP_UPDATE="1"
-        - PYTHON_BUILD=true
-
-    # MacOS 10.12, Python 3.7
-
-    # - name: "klayout python3 osx10.12"
-    - name: "cp37-cp37m-macosx_10_12_x86_64.whl"
-      os: osx
-      osx_image: xcode9.2  # macOS 10.12
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - python3
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL="shopt -s expand_aliases; alias python='python3'; alias pip='pip3';"
-        - ARCHFLAGS="-std=c++11"
-        - PIP_UPDATE="1"
-        - PYTHON_BUILD=true
-    
-  exclude:
-
-    # No XCode 8.2.1 for Mac OS 10.11
-
-    # - name: "klayout python3 osx10.11"
-    - name: "cp37-cp37m-macosx_10_11_x86_64.whl"
-      os: osx
-      osx_image: xcode8  # macOS 10.11
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL="brew update; brew config; brew upgrade python; brew postinstall python; ls -l /usr/local/opt/python/libexec/bin/; shopt -s expand_aliases; alias python='/usr/local/opt/python/libexec/bin/python'; alias pip='/usr/local/opt/python/libexec/bin/pip';"
-        - ARCHFLAGS="-std=c++11"
-        - PIP_UPDATE="1"
-        - PYTHON_BUILD=true
-
-    # Python 2 is EOL
-
-    # python 2 osx
-    
-    # - name: "klayout python2 osx10.13"
-    - name: "cp27-cp27m-macosx_10_13_x86_64.whl"
-      os: osx
-      osx_image: xcode9.4  # macOS 10.13
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL=""
-        - ARCHFLAGS="-std=c++11"
-        - PIP_UPDATE="1"
-        - PYTHON_BUILD=true
-    
-    # - name: "klayout python2 osx10.12"
-    - name: "cp27-cp27m-macosx_10_12_x86_64.whl"
-      os: osx
-      osx_image: xcode8.3  # macOS 10.12
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL="brew install python2 || brew link --overwrite python@2"  # deficient python2 in travis's xcode8.3 (no ssl)
-        - ARCHFLAGS="-std=c++11"
-        - PIP_UPDATE="1"
-        - PYTHON_BUILD=true
-    
-    # - name: "klayout python2 osx10.11"
-    - name: "cp27-cp27m-macosx_10_11_x86_64.whl"
-      os: osx
-      osx_image: xcode8  # macOS 10.11
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL=""
-        - ARCHFLAGS="-std=c++11"
-        - PIP_UPDATE="1"
-        - PYTHON_BUILD=true
-
-    # KLayout builds not enabled for now on MacOS
-
-    # KLayout builds for mac
-    # Python 3
-    - name: "KLayout macOS 10.13 with py3.7"
-      os: osx
-      osx_image: xcode9.4 # macOS 10.13
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - python3
-            - qt
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL=""
-        - PYTHON_VERSION=B37
-        - MACOS_VERSION=HighSierra
-        - KLAYOUT_BUILD=true
-
-    - name: "KLayout macOS 10.12 with py3.7"
-      os: osx
-      osx_image: xcode8.3 # macOS 10.12
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - python3
-            - qt
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL=""
-        - PYTHON_VERSION=B37
-        - MACOS_VERSION=Sierra
-        - KLAYOUT_BUILD=true
-
-    - name: "KLayout macOS 10.11 with py3.7"
-      os: osx
-      osx_image: xcode8 # macOS 10.11
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - python3
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL="brew update; brew config; brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/56c500b569c724b049be7ab9e12d9693f85522f9/Formula/qt.rb"  # Qt 5.11.2
-        - PYTHON_VERSION=B37
-        - MACOS_VERSION=ElCapitan
-        - KLAYOUT_BUILD=true
-
-    # Python 2
-    - name: "KLayout macOS 10.13 with py2.7"
-      os: osx
-      osx_image: xcode9.4 # macOS 10.13
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - qt
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL=""
-        - PYTHON_VERSION=Sys
-        - MACOS_VERSION=HighSierra
-        - KLAYOUT_BUILD=true
-
-    - name: "KLayout macOS 10.12 with py2.7"
-      os: osx
-      osx_image: xcode8.3 # macOS 10.12
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - qt
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL=""
-        - PYTHON_VERSION=Sys
-        - MACOS_VERSION=Sierra
-        - KLAYOUT_BUILD=true
-
-    - name: "KLayout macOS 10.11 with py2.7"
-      os: osx
-      osx_image: xcode8 # macOS 10.11
-      cache:
-        directories:
-        - ccache
-      addons:
-        homebrew:
-          packages:
-            - ccache
-          update: true
-      env:
-        - MATRIX_EVAL="brew update; brew config; brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/56c500b569c724b049be7ab9e12d9693f85522f9/Formula/qt.rb"  # Qt 5.11.2
-        - PYTHON_VERSION=Sys
-        - MACOS_VERSION=ElCapitan
-        - KLAYOUT_BUILD=true
-
-before_install:
-  - env
-  - gem install dropbox-deployment
-  - if [ "${TRAVIS_OS_NAME}" == "osx" ]; then
-        export PATH="/usr/local/opt/ccache/libexec:$PATH";
-        mkdir -p ccache;
-        export CCACHE_DIR="`pwd`/ccache";
-        ccache -s;
-    fi
-  - eval "${MATRIX_EVAL}"
-  - if [ "${PIP_UPDATE}" == "1" ]; then
-        pip --version;
-        pip install --upgrade pip || sudo pip install --upgrade pip;
-        pip --version;
-        pip install --upgrade setuptools wheel || sudo pip install --upgrade setuptools wheel;
-    fi
-  - python -c "import distutils.sysconfig as sysconfig; print(sysconfig.__file__)"
-
-install:
-  - if [ "$DOCKER_BUILD" = true ]; then
-        docker pull $DOCKER_IMAGE;
-    fi
-
-script:
-  - if [ "$DOCKER_BUILD" = true ]; then
-        mkdir -p ccache;
-        mkdir -p wheelhouse;
-        docker run --rm -e DOCKER_IMAGE -e PY_VERSION -v `pwd`:/io $DOCKER_IMAGE $PRE_CMD "/io/ci-scripts/docker/docker_build.sh";
-        klayout_version=$(python -c 'import setup; print(setup.Config().version())'); 
-        mkdir -p deploy/dist-pymod/$klayout_version;
-        cp -a wheelhouse/{klayout-*manylinux2014*.whl,*.zip} deploy/dist-pymod/$klayout_version;
-        if [ "$TEST_IN_HOST" = true ]; then
-            pip install klayout --no-index -f ./wheelhouse;
-            python testdata/pymod/import_db.py;
-            python testdata/pymod/import_rdb.py;
-            python testdata/pymod/import_tl.py;
-            python testdata/pymod/import_lib.py;
-            python testdata/pymod/pya_tests.py;
-        fi
-    fi 
-  - if [ "$PYTHON_BUILD" = true ]; then
-        python setup.py build;
-        python setup.py bdist_wheel;
-        python setup.py install;
-        python setup.py sdist --formats=zip;
-        python testdata/pymod/import_db.py;
-        python testdata/pymod/import_rdb.py;
-        python testdata/pymod/import_tl.py;
-        python testdata/pymod/import_lib.py;
-        python testdata/pymod/pya_tests.py;
-        klayout_version=$(python -c 'import setup; print(setup.Config().version())');
-        mkdir -p deploy/dist-pymod/$klayout_version;
-        cp -a dist/{*.whl,*.zip} deploy/dist-pymod/$klayout_version;
-        python -c 'import klayout.db as db; print(dir(db))';
-        python -c 'import klayout.rdb as rdb; print(dir(rdb))';
-        python -c 'import klayout.tl as tl; print(dir(tl))';
-    fi
-  - if [ "$KLAYOUT_BUILD" = true ]; then
-        ./travis-build.sh;
-    fi
-
-before_cache:
-  - if [ "${TRAVIS_OS_NAME}" == "osx" ]; then
-        ccache -s;
-    fi
-
-after_success:
-  # upload to dropbox
-  # need DROPBOX_OAUTH_BEARER environment variable
-  - dropbox-deployment
-
-  # uploading to pypi using twine
-  # need TWINE_USERNAME, TWINE_PASSWORD and TWINE_REPOSITORY_URL env variable
-  - if [ ! -z "$TRAVIS_TAG" ] &&  [ ! -z "$TWINE_PASSWORD" ] && [[ "$PYTHON_BUILD" = true || "$DOCKER_BUILD" = true ]]; then
-      pip install -U twine || sudo pip install -U twine;
-      twine upload --skip-existing deploy/dist-pymod/$klayout_version/*;
-    fi
diff --git a/dropbox-deployment.yml b/dropbox-deployment.yml
deleted file mode 100644
index f9ee0f21b..000000000
--- a/dropbox-deployment.yml
+++ /dev/null
@@ -1,4 +0,0 @@
-deploy:
-  dropbox_path: /Builds/klayout # The path to the folder on Dropbox where the files will go
-  artifacts_path: deploy # can be a single file, or a path
-  debug: true # if you want to see more logs
diff --git a/scripts/makedeb.sh b/scripts/makedeb.sh
index 3932b43ee..690ecac45 100755
--- a/scripts/makedeb.sh
+++ b/scripts/makedeb.sh
@@ -41,6 +41,9 @@ ubuntu22)
 ubuntu24)
   depends="libqt5core5t64 (>= 5.15.13), libqt5designer5 (>= 5.15.13), libqt5gui5t64 (>= 5.15.13), libqt5multimedia5 (>= 5.15.13), libqt5multimediawidgets5 (>= 5.15.13), libqt5network5t64 (>= 5.15.13), libqt5opengl5t64 (>= 5.15.13), libqt5printsupport5t64 (>= 5.15.13), libqt5sql5t64 (>= 5.15.13), libqt5svg5 (>= 5.15.13), libqt5widgets5t64 (>= 5.15.13), libqt5xml5t64 (>= 5.15.13), libqt5xmlpatterns5 (>= 5.15.13), zlib1g (>= 1.3), libgit2-1.7 (>= 1.7.2), libruby3.2 (>= 3.2.3), python3 (>= 3.12.3), libpython3.12 (>= 3.12.3), libstdc++6 (>=14), libc6 (>= 2.39)" 
   ;;
+ubuntu26)
+  depends="libqt5core5t64 (>= 5.15.18), libqt5designer5 (>= 5.15.18), libqt5gui5t64 (>= 5.15.18), libqt5multimedia5 (>= 5.15.18), libqt5multimediawidgets5 (>= 5.15.18), libqt5network5t64 (>= 5.15.18), libqt5opengl5t64 (>= 5.15.18), libqt5printsupport5t64 (>= 5.15.18), libqt5sql5t64 (>= 5.15.18), libqt5svg5 (>= 5.15.18), libqt5widgets5t64 (>= 5.15.18), libqt5xml5t64 (>= 5.15.18), libqt5xmlpatterns5 (>= 5.15.18), zlib1g (>= 1.3), libgit2-1.9 (>= 1.9.1), libruby3.3 (>= 3.3.8), python3 (>= 3.14.3), libpython3.14 (>= 3.14.3), libstdc++6 (>=16), libc6 (>= 2.43)" 
+  ;;
 *)
   echo "Unknown target '$target' (given as first argument)"
   exit 1
diff --git a/src/db/db/dbCompoundOperation.cc b/src/db/db/dbCompoundOperation.cc
index dc9953582..cd4ea75a9 100644
--- a/src/db/db/dbCompoundOperation.cc
+++ b/src/db/db/dbCompoundOperation.cc
@@ -1682,13 +1682,9 @@ CompoundRegionCheckOperationNode::computed_dist () const
 void
 CompoundRegionCheckOperationNode::do_compute_local (CompoundRegionOperationCache * /*cache*/, db::Layout *layout, db::Cell *cell, const shape_interactions<db::PolygonWithProperties, db::PolygonWithProperties> &interactions, std::vector<std::unordered_set<db::EdgePairWithProperties> > &results, const db::LocalProcessorBase *proc) const
 {
-  //  consider magnification variants
-  db::EdgeRelationFilter check = m_check;
-  check.set_distance (proc->dist_for_cell (cell, check.distance ()));
-
   // TODO: needs a concept to deal with merged/non-merged inputs
   bool is_merged = true;
-  db::check_local_operation<db::PolygonWithProperties, db::PolygonWithProperties> op (check, m_different_polygons, is_merged, m_has_other, m_is_other_merged, m_options);
+  db::check_local_operation<db::PolygonWithProperties, db::PolygonWithProperties> op (m_check, m_different_polygons, is_merged, m_has_other, m_is_other_merged, m_options);
 
   tl_assert (results.size () == 1);
   if (results.front ().empty ()) {
@@ -1704,13 +1700,9 @@ CompoundRegionCheckOperationNode::do_compute_local (CompoundRegionOperationCache
 void
 CompoundRegionCheckOperationNode::do_compute_local (CompoundRegionOperationCache * /*cache*/, db::Layout *layout, db::Cell *cell, const shape_interactions<db::PolygonRefWithProperties, db::PolygonRefWithProperties> &interactions, std::vector<std::unordered_set<db::EdgePairWithProperties> > &results, const db::LocalProcessorBase *proc) const
 {
-  //  consider magnification variants
-  db::EdgeRelationFilter check = m_check;
-  check.set_distance (proc->dist_for_cell (cell, check.distance ()));
-
   // TODO: needs a concept to deal with merged/non-merged inputs
   bool is_merged = true;
-  db::check_local_operation<db::PolygonRefWithProperties, db::PolygonRefWithProperties> op (check, m_different_polygons, is_merged, m_has_other, m_is_other_merged, m_options);
+  db::check_local_operation<db::PolygonRefWithProperties, db::PolygonRefWithProperties> op (m_check, m_different_polygons, is_merged, m_has_other, m_is_other_merged, m_options);
 
   tl_assert (results.size () == 1);
   if (results.front ().empty ()) {
diff --git a/src/drc/unit_tests/drcSimpleTests.cc b/src/drc/unit_tests/drcSimpleTests.cc
index 2d6db90f1..40fcf0376 100644
--- a/src/drc/unit_tests/drcSimpleTests.cc
+++ b/src/drc/unit_tests/drcSimpleTests.cc
@@ -2113,3 +2113,13 @@ TEST(148_sparse_array_limit)
   run_test (_this, "148", true);
 }
 
+//  issue 2384
+TEST(149_compound_drc_with_mag)
+{
+  run_test (_this, "149", false);
+}
+
+TEST(149d_compound_drc_with_mag)
+{
+  run_test (_this, "149", true);
+}
diff --git a/src/gsi/gsi/gsiDeclTlPixelBuffer.cc b/src/gsi/gsi/gsiDeclTlPixelBuffer.cc
index c78cd1b1d..56b45a655 100644
--- a/src/gsi/gsi/gsiDeclTlPixelBuffer.cc
+++ b/src/gsi/gsi/gsiDeclTlPixelBuffer.cc
@@ -126,6 +126,40 @@ static std::vector<char> pixel_buffer_to_png (const tl::PixelBuffer *pb)
 #endif
 }
 
+//  Returns an 8-byte header (width, height as uint32) followed by the raw ARGB32 pixel data
+static std::vector<char> pixel_buffer_to_bytes (const tl::PixelBuffer *pb)
+{
+  uint32_t w = pb->width (), h = pb->height ();
+  size_t n = (size_t) w * (size_t) h * 4;
+  std::vector<char> data (8 + n);
+  memcpy (data.data (), &w, 4);
+  memcpy (data.data () + 4, &h, 4);
+  memcpy (data.data () + 8, pb->data (), n);
+  return data;
+}
+
+//  Inverse of to_bytes: reads width/height from the header and checks the length
+static tl::PixelBuffer pixel_buffer_from_bytes (const std::vector<char> &data)
+{
+  uint32_t w = 0, h = 0;
+  if (data.size () >= 8) {
+    memcpy (&w, data.data (), 4);
+    memcpy (&h, data.data () + 4, 4);
+  }
+  //  sanity guard against malformed headers: reader caps dimensions at 64k x 64k
+  //  (generous for finely-resolved drawings), writer stays full 32-bit
+  const uint32_t max_dim = 65536;
+  if (w > max_dim || h > max_dim) {
+    throw tl::Exception (tl::to_string (tr ("Invalid PixelBuffer byte stream: width or height exceeds the 65536 x 65536 limit")));
+  }
+  if (data.size () != 8 + (size_t) w * (size_t) h * 4) {
+    throw tl::Exception (tl::to_string (tr ("Invalid PixelBuffer byte stream: length does not match the width and height in the header")));
+  }
+  tl::PixelBuffer pb (w, h, (const tl::color_t *) (data.data () + 8));
+  pb.set_transparent (true);
+  return pb;
+}
+
 
 Class<tl::PixelBuffer> decl_PixelBuffer ("lay", "PixelBuffer",
   gsi::constructor ("new", &create_pixel_buffer, gsi::arg ("width"), gsi::arg ("height"),
@@ -188,6 +222,24 @@ Class<tl::PixelBuffer> decl_PixelBuffer ("lay", "PixelBuffer",
     "\n"
     "This method may not be available if PNG support is not compiled into KLayout."
   ) +
+  gsi::method_ext ("to_bytes", &pixel_buffer_to_bytes,
+    "@brief Converts the pixel buffer to a raw byte stream\n"
+    "\n"
+    "The stream starts with an 8-byte header (width and height as 32-bit unsigned integers) "
+    "followed by the raw ARGB32 pixel data with 4 bytes per pixel in row-major order, "
+    "top to bottom. Unlike \\to_png_data this method has zero encoding overhead. "
+    "Use \\from_bytes to reconstruct the pixel buffer.\n"
+    "\n"
+    "This method has been added in version 0.30.10."
+  ) +
+  gsi::method ("from_bytes", &pixel_buffer_from_bytes, gsi::arg ("data"),
+    "@brief Reconstructs a pixel buffer from a byte stream produced by \\to_bytes\n"
+    "\n"
+    "The width and height are taken from the header and the stream length is checked against them. "
+    "The dimensions are capped at 65536 x 65536; a header exceeding this limit raises an error.\n"
+    "\n"
+    "This method has been added in version 0.30.10."
+  ) +
   gsi::method ("patch", &tl::PixelBuffer::patch, gsi::arg ("other"),
     "@brief Patches another pixel buffer into this one\n"
     "\n"
diff --git a/src/laybasic/laybasic/layLayoutCanvas.cc b/src/laybasic/laybasic/layLayoutCanvas.cc
index 2d93485f0..6ddd22956 100644
--- a/src/laybasic/laybasic/layLayoutCanvas.cc
+++ b/src/laybasic/laybasic/layLayoutCanvas.cc
@@ -855,7 +855,9 @@ LayoutCanvas::image_with_options (unsigned int width, unsigned int height, int l
   lay::RedrawThread redraw_thread (&rd_canvas, mp_view);
 
   //  render the layout
-  redraw_thread.start (0 /*synchronous*/, m_layers, vp, resolution, font_resolution, true);
+  int workers = mp_view->synchronous () ? 0 : mp_view->drawing_workers ();
+  redraw_thread.start (workers, m_layers, vp, resolution, font_resolution, true);
+  redraw_thread.wait ();
   redraw_thread.stop (); // safety
 
   //  paint the background objects. It uses "img" to paint on.
diff --git a/testdata/drc/drcSimpleTests_149.drc b/testdata/drc/drcSimpleTests_149.drc
new file mode 100644
index 000000000..d08836713
--- /dev/null
+++ b/testdata/drc/drcSimpleTests_149.drc
@@ -0,0 +1,18 @@
+source $drc_test_source
+target $drc_test_target
+
+if $drc_test_deep
+  deep
+end
+
+deep
+
+metal2_drawn = polygons(36, 0)
+metal2_slot = polygons(36, 3)
+
+metal2_drawn.output(36, 0)
+metal2_slot.output(36, 3)
+
+violations_enclosed = metal2_slot.drc(enclosed(metal2_drawn) < 10.um)
+violations_enclosed.output(100, 0)
+
diff --git a/testdata/drc/drcSimpleTests_149.gds b/testdata/drc/drcSimpleTests_149.gds
new file mode 100644
index 000000000..a1d4e0d45
Binary files /dev/null and b/testdata/drc/drcSimpleTests_149.gds differ
diff --git a/testdata/drc/drcSimpleTests_au149.gds b/testdata/drc/drcSimpleTests_au149.gds
new file mode 100644
index 000000000..e376ef0bb
Binary files /dev/null and b/testdata/drc/drcSimpleTests_au149.gds differ
diff --git a/testdata/drc/drcSimpleTests_au149d.gds b/testdata/drc/drcSimpleTests_au149d.gds
new file mode 100644
index 000000000..0bc742300
Binary files /dev/null and b/testdata/drc/drcSimpleTests_au149d.gds differ
diff --git a/testdata/python/dbShapesTest.py b/testdata/python/dbShapesTest.py
index 2be2b5c49..47622e442 100644
--- a/testdata/python/dbShapesTest.py
+++ b/testdata/python/dbShapesTest.py
@@ -53,13 +53,18 @@ class DBShapesTest(unittest.TestCase):
   # Issue #2012 (reference count)
   def test_2(self):
 
+    # an empty dict provides the normal reference count
+    obj = {}
+    rc = sys.getrefcount(obj)
+
     ly = pya.Layout()
+    self.assertEqual(sys.getrefcount(ly), rc)
     top = ly.create_cell("TOP")
     l1 = ly.layer(1, 0)
     top.shapes(l1).insert(pya.Box(0, 0, 100, 200))
 
     shapes = top.shapes(l1)
-    self.assertEqual(sys.getrefcount(shapes), 2)
+    self.assertEqual(sys.getrefcount(shapes), rc)
 
   # Tests the ability to take PolygonWithProperties instead of base class
   # for setter
diff --git a/testdata/python/layPixelBuffer.py b/testdata/python/layPixelBuffer.py
index 8a91ea189..f04ebfde1 100644
--- a/testdata/python/layPixelBuffer.py
+++ b/testdata/python/layPixelBuffer.py
@@ -57,6 +57,31 @@ class LAYPixelBufferTests(unittest.TestCase):
     pb_copy = pya.PixelBuffer.read_png(tmp)
     self.assertEqual(compare(pb, pb_copy), True)
 
+  def test_2(self):
+
+    # to_bytes / from_bytes round-trip
+
+    import struct
+
+    pb = pya.PixelBuffer(10, 20)
+    pb.transparent = True
+    pb.fill(0xf0010203)
+    pb.set_pixel(1, 2, 0x80102030)
+
+    data = bytes(pb.to_bytes())
+    self.assertEqual(len(data), 8 + 10 * 20 * 4)
+    self.assertEqual(struct.unpack("=II", data[0:8]), (10, 20))  # width, height header
+
+    self.assertEqual(pb == pya.PixelBuffer.from_bytes(data), True)
+
+    # a mismatched stream is rejected
+    with self.assertRaises(Exception):
+      pya.PixelBuffer.from_bytes(data[:-4])
+
+    # a header beyond the 64k x 64k limit is rejected
+    with self.assertRaises(Exception):
+      pya.PixelBuffer.from_bytes(struct.pack("=II", 65537, 1))
+
 
 # run unit tests
 if __name__ == '__main__':
diff --git a/testdata/ruby/layPixelBuffer.rb b/testdata/ruby/layPixelBuffer.rb
index abcb3254b..d6054c453 100644
--- a/testdata/ruby/layPixelBuffer.rb
+++ b/testdata/ruby/layPixelBuffer.rb
@@ -152,6 +152,41 @@ class LAYPixelBuffer_TestClass < TestBase
 
   end
 
+  def test_5
+
+    # to_bytes / from_bytes round-trip
+
+    pb = RBA::PixelBuffer::new(10, 20)
+    pb.transparent = true
+    pb.fill(0xf0010203)
+    pb.set_pixel(1, 2, 0x80102030)
+
+    bytes = pb.to_bytes
+    assert_equal(bytes.size, 8 + 10 * 20 * 4)
+    assert_equal(bytes[0, 8].unpack("VV"), [ 10, 20 ])  # width, height header
+
+    assert_equal(pb == RBA::PixelBuffer.from_bytes(bytes), true)
+
+    # a mismatched stream is rejected
+    error = false
+    begin
+      RBA::PixelBuffer.from_bytes(bytes[0, bytes.size - 4])
+    rescue
+      error = true
+    end
+    assert_equal(error, true)
+
+    # a header beyond the 64k x 64k limit is rejected
+    error = false
+    begin
+      RBA::PixelBuffer.from_bytes([ 65537, 1 ].pack("VV"))
+    rescue
+      error = true
+    end
+    assert_equal(error, true)
+
+  end
+
   def test_11
 
     pb = RBA::BitmapBuffer::new
diff --git a/travis-build.sh b/travis-build.sh
deleted file mode 100755
index 9d5acabc3..000000000
--- a/travis-build.sh
+++ /dev/null
@@ -1,37 +0,0 @@
-#!/bin/bash
-set -e
-
-export PING_SLEEP=30s
-
-bash -c "while true; do find qt* | wc -l; sleep $PING_SLEEP; done" &
-PING_LOOP_PID=$!
-
-touch build.txt
-
-# Configure ccache
-mkdir -p ccache;
-export CCACHE_DIR="`pwd`/ccache"
-export QMAKE_CCACHE=1
-
-# Show ccache stats
-echo "Cache stats:"
-ccache -s
-
-echo "build"
-make build >> build.txt 2>&1 || tail -500 build.txt
-echo "deploy"
-make deploy >> build.txt 2>&1 || tail -500 build.txt
-echo "test"
-make test >> build.txt 2>&1 || tail -500 build.txt
-echo "dropbox-deploy"
-make dropbox-deploy
-
-# Show ccache stats
-echo "Cache stats:"
-ccache -s
-
-echo "build finished"
-
-kill $PING_LOOP_PID
-
-exit 0