diff --git a/makefiles/lint/shell.mk b/makefiles/lint/shell.mk
index cadc084..704038c 100644
--- a/makefiles/lint/shell.mk
+++ b/makefiles/lint/shell.mk
@@ -1,6 +1,21 @@
 # -*- makefile -*-
 # -----------------------------------------------------------------------
-# Copyright 2022 Open Networking Foundation (ONF) and the ONF Contributors
+# Copyright 2022-2023 Open Networking Foundation (ONF) and the ONF Contributors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# -----------------------------------------------------------------------
+# https://gerrit.opencord.org/plugins/gitiles/onf-make
+# ONF.makefile.version = 1.0
 # -----------------------------------------------------------------------
 
 ##-------------------##
@@ -18,7 +33,8 @@
 # shell-check    := $(env-clean) pylint
 shell-check      := shellcheck
 
-shell-check-args += -a
+shell-check-args += --check-sourced
+shell-check-args += --external-sources
 
 ##-------------------##
 ##---]  TARGETS  [---##
@@ -28,6 +44,7 @@
 endif
 
 ## -----------------------------------------------------------------------
+## Intent: Perform a lint check on command line script sources
 ## -----------------------------------------------------------------------
 lint-shell:
 	$(shell-check) -V
@@ -36,8 +53,13 @@
 	    | $(xargs-n1) $(shell-check) $(shell-check-args)
 
 ## -----------------------------------------------------------------------
+## Intent: Display command help
 ## -----------------------------------------------------------------------
-help ::
-	@echo '  lint-shell                    Syntax check shell sources'
+help-summary ::
+	@echo '  lint-shell          Syntax check shell sources'
+
+# [SEE ALSO]
+# -----------------------------------------------------------------------
+#   o https://www.shellcheck.net/wiki/Directive
 
 # [EOF]