diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 9238045ec49..af8aec8cb98 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2103,19 +2103,15 @@ let
 
   pal = callPackage ../tools/misc/pal { };
 
-  pandoc = with haskellPackages; pandoc.override {
-    cabal = cabal.override {
-      extension = self: super: {
-        configureFlags = super.configureFlags or "" + " -fembed_data_files";
-        buildTools = super.buildTools or [] ++ [hsb2hs];
-        enableSharedExecutables = false;
-        enableSharedLibraries = false;
-        isLibrary = false;
-        noHaddock = true;
-        postFixup = "rm -rf $out/lib $out/nix-support $out/share";
-      };
-    };
-  };
+  pandoc = haskell-ng.lib.overrideCabal haskellngPackages.pandoc (drv: {
+    configureFlags = drv.configureFlags or [] ++ ["-fembed_data_files"];
+    buildTools = drv.buildTools or [] ++ [haskellngPackages.hsb2hs];
+    enableSharedExecutables = false;
+    enableSharedLibraries = false;
+    isLibrary = false;
+    doHaddock = false;
+    postFixup = "rm -rf $out/lib $out/nix-support $out/share";
+  });
 
   panomatic = callPackage ../tools/graphics/panomatic { };