1 files changed, 6 insertions, 0 deletions
diff --git a/src/libexpr/eval.hh b/src/libexpr/eval.hh
index 29c8341dfb..b08bec8d9e 100644
--- a/src/libexpr/eval.hh
+++ b/src/libexpr/eval.hh
@@ -203,6 +203,12 @@ private:
     void addPrimOp(const string & name,
         unsigned int arity, PrimOpFun primOp);
 
+public:
+
+    void getBuiltin(const string & name, Value & v);
+
+private:
+
     inline Value * lookupVar(Env * env, const VarRef & var, bool noEval);
 
     friend class ExprVar;