diff --git a/pkgs/tools/networking/mu/default.nix b/pkgs/tools/networking/mu/default.nix
index c82588559df..2813e7e655d 100644
--- a/pkgs/tools/networking/mu/default.nix
+++ b/pkgs/tools/networking/mu/default.nix
@@ -1,7 +1,7 @@
 { fetchurl, stdenv, sqlite, pkgconfig, autoreconfHook
 , xapian, glib, gmime, texinfo , emacs, guile
 , gtk3, webkitgtk24x, libsoup, icu
-, withMug ? stdenv.isLinux }:
+, withMug ? false }:
 
 stdenv.mkDerivation rec {
   version = "0.9.18";