diff --git a/pkgs/stdenv/generic/make-derivation.nix b/pkgs/stdenv/generic/make-derivation.nix
index fda9158ff179..5998625c7be1 100644
--- a/pkgs/stdenv/generic/make-derivation.nix
+++ b/pkgs/stdenv/generic/make-derivation.nix
@@ -67,7 +67,7 @@ let
     if isFunction fnOrAttrs then
       makeDerivationExtensible fnOrAttrs
     else
-      makeDerivationExtensibleConst fnOrAttrs;
+      makeDerivationExtensible (_: fnOrAttrs);
 
   checkMeta = import ./check-meta.nix {
     inherit lib config;
@@ -136,8 +136,6 @@ let
     in
     finalPackage;
 
-  makeDerivationExtensibleConst = attrs: makeDerivationExtensible (_: attrs);
-
   knownHardeningFlags = [
     "bindnow"
     "format"