From aebdcd55ced193d553ff55ddb66a0e54f21a26d6 Mon Sep 17 00:00:00 2001
From: alberic89 <alberic89@gmx.com>
Date: Sun, 31 Aug 2025 15:15:52 +0200
Subject: [PATCH] fix: downgrade ubuntu version for appimage build

If the AppImage is built with a too recent version of the glibc, it will not run on an older system.
For more details, see https://docs.appimage.org/introduction/concepts.html#build-on-old-systems-run-on-newer-systems
---
 .ci_scripts/package.sh         | 2 +-
 .github/workflows/gnulinux.yml | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/.ci_scripts/package.sh b/.ci_scripts/package.sh
index 4ade8a3863c..f090f1d524e 100755
--- a/.ci_scripts/package.sh
+++ b/.ci_scripts/package.sh
@@ -21,7 +21,7 @@ if [ "$SOURCE" = "ON" ]; then
     cpack --config CPackSourceConfig.cmake -G TGZ;
 fi
 
-if ([ "$OS_NAME" = "ubuntu-latest" ]) && [ "$PACKAGE" = "ON" ]; then
+if ([[ "$OS_NAME" = "ubuntu"* ]]) && [ "$PACKAGE" = "ON" ]; then
     ../.ci_scripts/build_appimage.sh
     # extract built appimages for uploading
     mv ~/out/* .
diff --git a/.github/workflows/gnulinux.yml b/.github/workflows/gnulinux.yml
index 2fbbc269569..944c93345a0 100644
--- a/.github/workflows/gnulinux.yml
+++ b/.github/workflows/gnulinux.yml
@@ -33,11 +33,11 @@ jobs:
         # TODO Working Linux 32-bit packaging
         # TODO CTest & coverage workflow implement
         arch: [32, 64]
-        os: [ubuntu-latest]
+        os: [ubuntu-22.04]
         compiler: [gcc, clang]
         build_type: [Debug, Release]
         include:
-          - os: ubuntu-latest
+          - os: ubuntu-22.04
             build_type: Release
             compiler: gcc
             arch: 64