diff --git a/pkgs/development/libraries/haskell/yst/default.nix b/pkgs/development/libraries/haskell/yst/default.nix
index d194b1970c8..ee9bb33cdba 100644
--- a/pkgs/development/libraries/haskell/yst/default.nix
+++ b/pkgs/development/libraries/haskell/yst/default.nix
@@ -1,16 +1,17 @@
-{ cabal, csv, filepath, HDBC, HDBCSqlite3, HsSyck, HStringTemplate
-, pandoc, parsec, split, time, utf8String, xhtml
+{ cabal, aeson, csv, filepath, HDBC, HDBCSqlite3, HStringTemplate
+, pandoc, parsec, split, text, time, unorderedContainers, xhtml
+, yaml
 }:
 
 cabal.mkDerivation (self: {
   pname = "yst";
-  version = "0.3.1.1";
-  sha256 = "1wc2s5aan4rqdrpqgqvka5pqm3d691si5hdf0m0wpi2hzkwl3qv3";
+  version = "0.4.0.1";
+  sha256 = "0j260lvprgsi9qgjwji2cc25k0dzrw94h2527rwghik8baa1ha3r";
   isLibrary = false;
   isExecutable = true;
   buildDepends = [
-    csv filepath HDBC HDBCSqlite3 HsSyck HStringTemplate pandoc parsec
-    split time utf8String xhtml
+    aeson csv filepath HDBC HDBCSqlite3 HStringTemplate pandoc parsec
+    split text time unorderedContainers xhtml yaml
   ];
   meta = {
     homepage = "http://github.com/jgm/yst";