diff --git a/documentation/content/en/books/handbook/cutting-edge/_index.adoc b/documentation/content/en/books/handbook/cutting-edge/_index.adoc
--- a/documentation/content/en/books/handbook/cutting-edge/_index.adoc
+++ b/documentation/content/en/books/handbook/cutting-edge/_index.adoc
@@ -735,7 +735,10 @@
 # cd /usr/src          <.>
 # make installworld    <.>
 # etcupdate -B         <.>
+# make delete-old      <.>
 # shutdown -r now      <.>
+check that no program uses the old libraries anymore
+# make delete-old-libs <.>
 ....
 
 <.> Get the latest version of the source. See
@@ -759,7 +762,11 @@
 
 <.> Update and merge configuration files in [.filename]#/etc/#.
 
+<.> Delete obsolete directories/files
+
 <.> Restart the system to use the newly-built world and kernel.
+
+<.> Delete obsolete libraries (in case no thirdparty program uses them anymore)
 ====
 
 [[updating-src-preparing]]