diff --git a/pkgs/top-level/emacs-packages.nix b/pkgs/top-level/emacs-packages.nix
index 9c0f8a1f10c7..0878a6adeb8b 100644
--- a/pkgs/top-level/emacs-packages.nix
+++ b/pkgs/top-level/emacs-packages.nix
@@ -1531,6 +1531,7 @@ let
     src = external.structured-haskell-mode.src;
     packageRequires = [ haskell-mode ];
     fileSpecs = [ "elisp/*.el" ];
+    propagatedUserEnvPkgs = [ external.structured-haskell-mode ];
 
     meta = {
       description = "Structured editing Emacs mode for Haskell";