diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 8bc2c48df0c..1a3c616ce1f 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -154,13 +154,6 @@ rec {
 	  version = getConfig [ "environment" "versions" name ];
   };
 
-  # The same, another syntax.
-  # Warning: syntax for configuration.nix changed too
-  useVersion = name: f: f
-  {
-	  version = getConfig [ "environment" "versions" name ];
-  };
-
   # Whether user enabled given feature for the given package?
   getFlag = flag: package: default:
   getConfig [ "environment" "flags" package flag ]