diff --git a/pkgs/tools/misc/ttfautohint/default.nix b/pkgs/tools/misc/ttfautohint/default.nix
index 38dac37aa7d..decbddcd477 100644
--- a/pkgs/tools/misc/ttfautohint/default.nix
+++ b/pkgs/tools/misc/ttfautohint/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
     sha256 = "1yflnydzdfkr8bi29yf42hb6h6525a4rdid3w8qjfk8rpqh53pqj";
   };
 
-  postPatch = ''
+  postAutoreconf = ''
     substituteInPlace configure --replace "macx-g++" "macx-clang"
   '';