diff --git a/pkgs/development/libraries/haskell/clientsession/default.nix b/pkgs/development/libraries/haskell/clientsession/default.nix
index cee91c51be0..bd06ff10a86 100644
--- a/pkgs/development/libraries/haskell/clientsession/default.nix
+++ b/pkgs/development/libraries/haskell/clientsession/default.nix
@@ -1,17 +1,19 @@
 # This file was auto-generated by cabal2nix. Please do NOT edit manually!
 
 { cabal, base64Bytestring, cereal, cipherAes, cprngAes, cryptoApi
-, cryptoRandom, entropy, hspec, HUnit, QuickCheck, skein, tagged
-, transformers
+, cryptoRandom, entropy, hspec, HUnit, QuickCheck, setenv, skein
+, tagged, transformers
 }:
 
 cabal.mkDerivation (self: {
   pname = "clientsession";
-  version = "0.9.0.5";
-  sha256 = "0l11wpxr3cgd8q708ay7957mdzq7nhm7c6z3p9iwl0lp3pkcl810";
+  version = "0.9.1";
+  sha256 = "1hq4f5iq4xb9jilr6qprww9lql314vpfw5khwmizljry9cwd2gq7";
+  isLibrary = true;
+  isExecutable = true;
   buildDepends = [
     base64Bytestring cereal cipherAes cprngAes cryptoApi cryptoRandom
-    entropy skein tagged
+    entropy setenv skein tagged
   ];
   testDepends = [ cereal hspec HUnit QuickCheck transformers ];
   meta = {