diff --git a/src/libstore/globals.hh b/src/libstore/globals.hh
index 3e4ead76c..81d407236 100644
--- a/src/libstore/globals.hh
+++ b/src/libstore/globals.hh
@@ -923,7 +923,8 @@ public:
           value.
           )"};
 
-    Setting<Strings> experimentalFeatures{this, {}, "experimental-features",
+    Setting<Strings> experimentalFeatures{
+        this, {"flakes", "nix-command"}, "experimental-features",
         "Experimental Nix features to enable."};
 
     bool isExperimentalFeatureEnabled(const std::string & name);