diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index f4a1a930ea34..7bc300859301 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -10266,7 +10266,7 @@ let
 
   d4x = callPackage ../applications/misc/d4x { };
 
-  darcs = haskell-ng.lib.overrideCabal haskell-ng.packages.ghc784.darcs (drv: {
+  darcs = haskell-ng.lib.overrideCabal haskellngPackages.darcs (drv: {
     configureFlags = (stdenv.lib.remove "-flibrary" drv.configureFlags or []) ++ ["-f-library"];
     enableSharedExecutables = false;
     isLibrary = false;