diff --git a/pkgs/development/libraries/haskell/sized-types/default.nix b/pkgs/development/libraries/haskell/sized-types/default.nix
index 672b2c090ef..3fc69552e11 100644
--- a/pkgs/development/libraries/haskell/sized-types/default.nix
+++ b/pkgs/development/libraries/haskell/sized-types/default.nix
@@ -1,14 +1,15 @@
-{ cabal }:
+{ cabal, singletons }:
 
 cabal.mkDerivation (self: {
   pname = "sized-types";
-  version = "0.3.4.0";
-  sha256 = "0fpk7xpqzzylxbnxhz56lxzfnrhfibn0x7ahxl91x6biysnh714c";
+  version = "0.5.0";
+  sha256 = "1cvgw2plzgpddg2p74hylx499dv4hn2nc8s085mnayp5n9jkn8md";
   isLibrary = true;
   isExecutable = true;
+  buildDepends = [ singletons ];
   meta = {
     homepage = "http://www.ittc.ku.edu/csdl/fpg/Tools";
-    description = "Sized types in Haskell";
+    description = "Sized types in Haskell using the GHC Nat kind";
     license = self.stdenv.lib.licenses.bsd3;
     platforms = self.ghc.meta.platforms;
   };