diff --git a/pkgs/development/libraries/haskell/hamlet/default.nix b/pkgs/development/libraries/haskell/hamlet/default.nix
index 39df11063ada..28881da84c38 100644
--- a/pkgs/development/libraries/haskell/hamlet/default.nix
+++ b/pkgs/development/libraries/haskell/hamlet/default.nix
@@ -4,12 +4,11 @@
 
 cabal.mkDerivation (self: {
   pname = "hamlet";
-  version = "1.1.6.2";
-  sha256 = "00asrmyb4k9xpsbwwafm3rj1lisssrc3hj3dsr827w9x86xxargy";
+  version = "1.1.6.3";
+  sha256 = "1kpj8j47licmdf364n0fn5908hsl6ib1wkiqhcx3m0nimb7pjnss";
   buildDepends = [
     blazeBuilder blazeHtml blazeMarkup failure parsec shakespeare text
   ];
-  jailbreak = true;
   meta = {
     homepage = "http://www.yesodweb.com/book/shakespearean-templates";
     description = "Haml-like template files that are compile-time checked";