diff --git a/doc/manual/expressions/builtins.xml b/doc/manual/expressions/builtins.xml
index 9517f2010..063bc04be 100644
--- a/doc/manual/expressions/builtins.xml
+++ b/doc/manual/expressions/builtins.xml
@@ -210,6 +210,35 @@ if builtins ? getEnv then builtins.getEnv "PATH" else ""
+ builtins.match
+ regex str
+
+ Returns a list if
+ regex matches
+ str precisely, otherwise returns null.
+ Each item in the list is a regex group.
+
+
+builtins.match "ab" "abc"
+
+
+Evaluates to null.
+
+
+builtins.match "abc" "abc"
+
+
+Evaluates to [ ].
+
+
+builtins.match "a(b)(c)" "abc"
+
+
+Evaluates to [ "b" "c" ].
+
+
+
+
builtins.elem
x xs