1 files changed, 2 insertions, 0 deletions
diff --git a/pkgs/applications/networking/browsers/firefox/wrapper.nix b/pkgs/applications/networking/browsers/firefox/wrapper.nix
index bf4c7f3e7d2..3a73afe48c5 100644
--- a/pkgs/applications/networking/browsers/firefox/wrapper.nix
+++ b/pkgs/applications/networking/browsers/firefox/wrapper.nix
@@ -40,6 +40,8 @@ stdenv.mkDerivation {
     echo ${browser} > $out/nix-support/propagated-user-env-packages
   '';
 
+  preferLocalBuild = true;
+
   # Let each plugin tell us (through its `mozillaPlugin') attribute
   # where to find the plugin in its tree.
   plugins = map (x: x + x.mozillaPlugin) plugins;