diff --git a/pkgs/development/libraries/haskell/yesod-core/default.nix b/pkgs/development/libraries/haskell/yesod-core/default.nix
index e27f751e6b1..8c55c35181b 100644
--- a/pkgs/development/libraries/haskell/yesod-core/default.nix
+++ b/pkgs/development/libraries/haskell/yesod-core/default.nix
@@ -1,34 +1,31 @@
 # This file was auto-generated by cabal2nix. Please do NOT edit manually!
 
-{ cabal, aeson, async, attoparsecConduit, blazeBuilder, blazeHtml
-, blazeMarkup, caseInsensitive, cereal, clientsession, conduit
-, conduitExtra, cookie, dataDefault, deepseq, exceptions
-, fastLogger, hamlet, hspec, httpTypes, HUnit, liftedBase
-, monadControl, monadLogger, mtl, network, networkConduit, parsec
-, pathPieces, QuickCheck, random, resourcet, safe, shakespeare
-, shakespeareCss, shakespeareI18n, shakespeareJs, streamingCommons
-, text, time, transformers, transformersBase, unixCompat, vector
-, wai, waiExtra, waiLogger, waiTest, warp, yesodRoutes
+{ cabal, aeson, async, blazeBuilder, blazeHtml, blazeMarkup
+, caseInsensitive, cereal, clientsession, conduit, conduitExtra
+, cookie, dataDefault, deepseq, exceptions, fastLogger, hspec
+, httpTypes, HUnit, liftedBase, monadControl, monadLogger, mtl
+, network, parsec, pathPieces, QuickCheck, random, resourcet, safe
+, shakespeare, streamingCommons, text, time, transformers
+, transformersBase, unixCompat, unorderedContainers, vector, wai
+, waiExtra, waiLogger, warp
 }:
 
 cabal.mkDerivation (self: {
   pname = "yesod-core";
-  version = "1.2.20.1";
-  sha256 = "188mfw9ag6287azb633xznwrbsavy5k12ycg2aahrxd84g6xjnan";
+  version = "1.4.2";
+  sha256 = "0qi1shmbsi8vkxzvyzqzgmdapnbfkkjvhkshkmr7rrdhkdbnkbxl";
   buildDepends = [
-    aeson attoparsecConduit blazeBuilder blazeHtml blazeMarkup
-    caseInsensitive cereal clientsession conduit conduitExtra cookie
-    dataDefault deepseq exceptions fastLogger hamlet httpTypes
-    liftedBase monadControl monadLogger mtl parsec pathPieces random
-    resourcet safe shakespeare shakespeareCss shakespeareI18n
-    shakespeareJs text time transformers transformersBase unixCompat
-    vector wai waiExtra waiLogger warp yesodRoutes
+    aeson blazeBuilder blazeHtml blazeMarkup caseInsensitive cereal
+    clientsession conduit conduitExtra cookie dataDefault deepseq
+    exceptions fastLogger httpTypes liftedBase monadControl monadLogger
+    mtl parsec pathPieces random resourcet safe shakespeare text time
+    transformers transformersBase unixCompat unorderedContainers vector
+    wai waiExtra waiLogger warp
   ];
   testDepends = [
-    async blazeBuilder conduit conduitExtra hamlet hspec httpTypes
-    HUnit liftedBase network networkConduit QuickCheck random resourcet
-    shakespeare shakespeareCss shakespeareJs streamingCommons text
-    transformers wai waiExtra waiTest
+    async blazeBuilder conduit conduitExtra hspec httpTypes HUnit
+    liftedBase network pathPieces QuickCheck random resourcet
+    shakespeare streamingCommons text transformers wai waiExtra
   ];
   jailbreak = true;
   meta = {