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-rw-r--r--pkgs/build-support/emacs/buffer.nix4
1 files changed, 1 insertions, 3 deletions
diff --git a/pkgs/build-support/emacs/buffer.nix b/pkgs/build-support/emacs/buffer.nix
index 8f824f4e1a57..b8bd4584e322 100644
--- a/pkgs/build-support/emacs/buffer.nix
+++ b/pkgs/build-support/emacs/buffer.nix
@@ -73,7 +73,5 @@ rec {
         haskell-package-env =
           builtins.head haskell-package.env.nativeBuildInputs;
     in
-      if is-haskell-package
-        then withPackages [ haskell-package-env ]
-        else {};
+      lib.optionalAttrs is-haskell-package (withPackages [ haskell-package-env ]);
 }