diff --git a/pkgs/development/libraries/haskell/json-assertions/default.nix b/pkgs/development/libraries/haskell/json-assertions/default.nix
index f287b60764e..fce4d5d7922 100644
--- a/pkgs/development/libraries/haskell/json-assertions/default.nix
+++ b/pkgs/development/libraries/haskell/json-assertions/default.nix
@@ -1,3 +1,5 @@
+# This file was auto-generated by cabal2nix. Please do NOT edit manually!
+
 { cabal, aeson, indexed, indexedFree, lens, text }:
 
 cabal.mkDerivation (self: {
@@ -10,6 +12,6 @@ cabal.mkDerivation (self: {
     description = "Test that your (Aeson) JSON encoding matches your expectations";
     license = self.stdenv.lib.licenses.bsd3;
     platforms = self.ghc.meta.platforms;
-    maintainers = [ self.stdenv.lib.maintainers.ocharles ];
+    maintainers = with self.stdenv.lib.maintainers; [ ocharles ];
   };
 })