diff --git a/documentation/content/en/articles/nanobsd/_index.adoc b/documentation/content/en/articles/nanobsd/_index.adoc
--- a/documentation/content/en/articles/nanobsd/_index.adoc
+++ b/documentation/content/en/articles/nanobsd/_index.adoc
@@ -108,6 +108,16 @@
 
 === Building a NanoBSD Image
 
+The source code of FreeBSD is required to build NanoBSD.
+To obtain the source code:
+
+[source,shell]
+....
+# git clone https://git.FreeBSD.org/src.git /usr/src
+....
+
+For more details, follow the steps extref:{handbook}cutting-edge#updating-src-obtaining-src[here].
+
 A NanoBSD image is built using a simple [.filename]#nanobsd.sh# shell script, which can be found in the [.filename]#/usr/src/tools/tools/nanobsd# directory.
 This script creates an image, which can be copied on the storage medium using the man:dd[1] utility.