@@ -16936,6 +16936,23 @@ Using the Configuration System
%base-packages)))
@end lisp
+@findex specification->package+output
+When a package has more than one output it can be a challenge to refer to
+specific output instead of just to the standard @code{out} output. For these
+situations one can use the @code{specification->package+output} procedure from
+the @code{(gnu packages)} module. For example:
+
+@lisp
+(use-modules (gnu packages))
+
+(operating-system
+ ;; ...
+ (packages (append (map specification->package+output
+ '("nss-certs" "git" "git:send-email"))
+ %base-packages)))
+
+@end lisp
+
@unnumberedsubsec System Services
@cindex services