diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index e1bc898261e8..740821b9855e 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -105898,7 +105898,7 @@ self: {
      mkDerivation {
        pname = "tasty-ant-xml";
        version = "1.0.1";
-       sha256 = "nil";
+       sha256 = "1wb9lm9rbk46g9cm2lpcrzh59zpcy270p824agg61bj1xb9jymsc";
        buildDepends = [
          base containers generic-deriving ghc-prim mtl stm tagged tasty
          transformers xml