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 488ca838b9b7..4781ff6d3aec 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
@@ -903,4 +903,7 @@ self: super: {
 
   # Needed for (<>) in prelude
   funcmp = super.funcmp_1_9;
+
+  # https://github.com/haskell-hvr/deepseq-generics/pull/4
+  deepseq-generics = doJailbreak super.deepseq-generics;
 }