diff --git a/scripts/build/ci/cirrus-ci_dispatcher.sh b/scripts/build/ci/cirrus-ci_dispatcher.sh
index 6c7f32e47..23809ef29 100755
--- a/scripts/build/ci/cirrus-ci_dispatcher.sh
+++ b/scripts/build/ci/cirrus-ci_dispatcher.sh
@@ -79,7 +79,7 @@ else
 fi
 
 # Determine changes from commit range.
-PACKAGE_NAMES=$(git diff-tree --no-commit-id --name-only -r "$GIT_CHANGES" packages/ 2>/dev/null | sed -E 's@^packages/([^/]*)/build.sh@\1@')
+PACKAGE_NAMES=$(git diff-tree --no-commit-id --name-only -r "$GIT_CHANGES" packages/ 2>/dev/null | grep build.sh | sed -E 's@^packages/([^/]*)/build.sh@\1@')
 
 ## Filter deleted packages.
 for pkg in $PACKAGE_NAMES; do