diff --git a/pkgs/development/tools/haskell/pointful/default.nix b/pkgs/development/tools/haskell/pointful/default.nix
index 6d0ed794721..7f077d160a3 100644
--- a/pkgs/development/tools/haskell/pointful/default.nix
+++ b/pkgs/development/tools/haskell/pointful/default.nix
@@ -1,3 +1,5 @@
+# This file was auto-generated by cabal2nix. Please do NOT edit manually!
+
 { cabal, haskellSrc, mtl, syb }:
 
 cabal.mkDerivation (self: {