manuals: add documentation for WKS_FILES

Fixes [YOCTO #14590]

(From yocto-docs rev: e736ff92b5b09f2028f3e8a5152973941d25dae4)

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Reviewed-by: Quentin Schulz <foss@0leil.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/documentation/dev-manual/common-tasks.rst b/documentation/dev-manual/common-tasks.rst
index 3a47a9ff27..ca6d594386 100644
--- a/documentation/dev-manual/common-tasks.rst
+++ b/documentation/dev-manual/common-tasks.rst
@@ -5481,7 +5481,9 @@ system needs to meet the following requirements:
    variable.
 
 -  Include the name of the :ref:`wic kickstart file <openembedded-kickstart-wks-reference>`
-   as part of the :term:`WKS_FILE` variable
+   as part of the :term:`WKS_FILE` variable. If multiple candidate files can
+   be provided by different layers, specify all the possible names through the
+   :term:`WKS_FILES` variable instead.
 
 Getting Help
 ------------