diff --git a/.github/workflows/build_macos.yml b/.github/workflows/build_macos.yml
index c0d808d..1e7d5d7 100644
--- a/.github/workflows/build_macos.yml
+++ b/.github/workflows/build_macos.yml
@@ -8,8 +8,6 @@ jobs:
     strategy:
       matrix:
         include:
-        - os: macos-12
-          configure_options: ''
         - os: macos-13
           configure_options: ''
         - os: macos-14
diff --git a/appveyor.yml b/appveyor.yml
index 8291f99..14f2b9b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -277,13 +277,13 @@ install:
 - cmd: if [%BUILD_ENVIRONMENT%]==[python-tox] (
     "%PYTHON%" -m pip install -U tox twine )
 - sh: if test `uname -s` = "Darwin" && test ${BUILD_ENVIRONMENT} = "python-tox"; then brew install -q python@${PYTHON_VERSION} tox twine-pypi || true; fi
-- sh: if test `uname -s` = "Linux" && test ${BUILD_ENVIRONMENT} = "python-tox"; then sudo apt-get update && sudo apt-get -y install autoconf automake autopoint build-essential flex git libtool patchelf pkg-config python3 python3-dev python3-distutils python3-pip python3-setuptools tox twine; fi
+- sh: if test `uname -s` = "Linux" && test ${BUILD_ENVIRONMENT} = "python-tox"; then sudo rm -f /etc/apt/sources.list.d/*llvm* /etc/apt/sources.list.d/*mongodb* /etc/apt/sources.list.d/*postgresql* /etc/apt/sources.list.d/*virtualbox* /etc/apt/sources.list.d/*yarnpkg* && sudo apt-get upgrade -y && sudo apt-get update -y --allow-releaseinfo-change && sudo apt-get -y install autoconf automake autopoint build-essential flex git libtool patchelf pkg-config python3 python3-dev python3-distutils python3-pip python3-setuptools tox twine; fi
 - ps: If ($env:BUILD_ENVIRONMENT -eq "cygwin64") {
     (New-Object Net.WebClient).DownloadFile("https://cygwin.com/setup-x86_64.exe", "C:\\cygwin64\\setup-x86_64.exe") }
 - cmd: if [%BUILD_ENVIRONMENT%]==[cygwin64] (
     C:\cygwin64\setup-x86_64.exe -qgnNdO -l C:\cygwin64\var\cache\setup -R c:\cygwin64 -s http://cygwin.mirror.constant.com -P gettext-devel -P python3-devel -P wget )
 - cmd: if [%BUILD_ENVIRONMENT%]==[mingw-w64] (
-    C:\msys64\usr\bin\pacman -S --noconfirm --needed autoconf automake gettext-devel libtool make mingw-w64-x86_64-gcc mingw-w64-x86_64-python3 )
+    C:\msys64\usr\bin\pacman -S --noconfirm --needed autoconf automake gettext-devel libtool make mingw-w64-x86_64-gcc mingw-w64-x86_64-python3 pkg-config )
 - ps: If ( ( "cygwin64-gcc-no-optimization", "mingw-w64-gcc-no-optimization" ).Contains( $env:TARGET ) ) {
     $ProgressPreference = 'SilentlyContinue'; Invoke-WebRequest -Uri https://uploader.codecov.io/latest/windows/codecov.exe -Outfile ..\codecov.exe }
 
diff --git a/configure.ac b/configure.ac
index a523e2b..221b4e2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@ AC_PREREQ([2.71])
 
 AC_INIT(
   [libscca],
-  [20241118],
+  [20241227],
   [joachim.metz@gmail.com])
 
 AC_CONFIG_SRCDIR(