diff --git a/.ci/monolithic-linux.sh b/.ci/monolithic-linux.sh
index 4a8418d7baa8c..ca619aa7e98a1 100755
--- a/.ci/monolithic-linux.sh
+++ b/.ci/monolithic-linux.sh
@@ -64,9 +64,11 @@ cmake -S "${MONOREPO_ROOT}"/llvm -B "${BUILD_DIR}" \
 
 start-group "ninja"
 
-# Targets are not escaped as they are passed as separate arguments.
-ninja -C "${BUILD_DIR}" -k 0 ${targets} |& tee ninja.log
-cp ${BUILD_DIR}/.ninja_log ninja.ninja_log
+if [[ "${targets}" != "" ]]; then
+  # Targets are not escaped as they are passed as separate arguments.
+  ninja -C "${BUILD_DIR}" -k 0 ${targets} |& tee ninja.log
+  cp ${BUILD_DIR}/.ninja_log ninja.ninja_log
+fi
 
 if [[ "${runtime_targets}" != "" ]]; then
   start-group "ninja Runtimes"
diff --git a/.ci/monolithic-windows.sh b/.ci/monolithic-windows.sh
index 7b926b87f3623..99e7758ce8d79 100755
--- a/.ci/monolithic-windows.sh
+++ b/.ci/monolithic-windows.sh
@@ -51,9 +51,11 @@ cmake -S "${MONOREPO_ROOT}"/llvm -B "${BUILD_DIR}" \
 
 start-group "ninja"
 
-# Targets are not escaped as they are passed as separate arguments.
-ninja -C "${BUILD_DIR}" -k 0 ${targets} |& tee ninja.log
-cp ${BUILD_DIR}/.ninja_log ninja.ninja_log
+if [[ "${targets}" != "" ]]; then
+  # Targets are not escaped as they are passed as separate arguments.
+  ninja -C "${BUILD_DIR}" -k 0 ${targets} |& tee ninja.log
+  cp ${BUILD_DIR}/.ninja_log ninja.ninja_log
+fi
 
 if [[ "${runtimes_targets}" != "" ]]; then
   start-group "ninja runtimes"