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+# Built-in Functions
+
+This section lists the functions built into the Nix expression
+evaluator. (The built-in function `derivation` is discussed above.)
+Some built-ins, such as `derivation`, are always in scope of every Nix
+expression; you can just access them right away. But to prevent
+polluting the namespace too much, most built-ins are not in
+scope. Instead, you can access them through the `builtins` built-in
+value, which is a set that contains all built-in functions and values.
+For instance, `derivation` is also available as `builtins.derivation`.
+
+ - `derivation` *attrs*; `builtins.derivation` *attrs*
+
+ `derivation` is described in [its own section](derivations.md).
+