diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
index 8884d8536414..5ae7c18cc2aa 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
@@ -692,5 +692,6 @@ self: super: {
 
   # Older versions don't compile.
   brick = self.brick_0_35;
+  timezone-olson = self.timezone-olson_0_1_9;
 
 }