diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 510c6c97f0bd..b4664e4e75b7 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -8388,12 +8388,12 @@ let
     withX = false;
   }));
 
-  emacs24Macport = callPackage ../applications/editors/emacs-24/macport.nix {
+  emacs24Macport = lowPrio (callPackage ../applications/editors/emacs-24/macport.nix {
     # resolve unrecognised flag '-fconstant-cfstrings' errors
     stdenv = if stdenv.isDarwin
       then clangStdenv
       else stdenv;
-  };
+  });
 
   emacsPackages = emacs: self: let callPackage = newScope self; in rec {
     inherit emacs;