diff --git a/.github/workflows/regression_test.yml b/.github/workflows/regression_test.yml
index 73de83c..858f9fb 100644
--- a/.github/workflows/regression_test.yml
+++ b/.github/workflows/regression_test.yml
@@ -22,7 +22,7 @@ jobs:
       # The reusable test job scopes its token separately.
       pages: write
       id-token: write
-    uses: eclipse-threadx/threadx/.github/workflows/regression_template.yml@b37cd4a81a1cb8c2ebefc438220ab7f009e13362
+    uses: eclipse-threadx/threadx/.github/workflows/regression_template.yml@c735b12c714e27431374a40163aa0af9619a52d3
     with:
       coverage_name: merged
       coverage_thresholds: '68 100'
diff --git a/scripts/install.sh b/scripts/install.sh
index 17575bc..b5381e2 100755
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -10,6 +10,8 @@
 # SPDX-License-Identifier: MIT
 ##############################################################################
 
+# Portions of this file were generated with AI assistance.
+
 set -euo pipefail
 
 # Retry transient package and network failures a bounded number of times.
@@ -30,9 +32,14 @@ apt_options=(-o Acquire::Retries=3 -o DPkg::Lock::Timeout=60)
 if ! retry sudo timeout 150 apt-get "${apt_options[@]}" update; then
     echo "Package index update failed; package installation will verify availability." >&2
 fi
-retry sudo timeout 150 apt-get "${apt_options[@]}" install -y \
-    cmake gcc-14 gcc-14-multilib git ninja-build python3-venv \
-    unifdef p7zip-full tofrodos gawk
+# CMake is installed only when none is on PATH. A GitHub runner image carries a
+# newer one in /usr/local/bin, which shadows the apt package.
+packages=(gcc-14 gcc-14-multilib git ninja-build python3-venv
+    unifdef p7zip-full tofrodos gawk)
+if ! command -v cmake > /dev/null; then
+    packages+=(cmake)
+fi
+retry sudo timeout 150 apt-get "${apt_options[@]}" install -y "${packages[@]}"
 
 venv_dir="${RUNNER_TEMP:-${TMPDIR:-/tmp}}/levelx-ci-venv"
 python3 -m venv "$venv_dir"