diff --git a/emacs/default.nix b/emacs/default.nix
index 062bb5ee2..ff4e4cad8 100644
--- a/emacs/default.nix
+++ b/emacs/default.nix
@@ -144,6 +144,7 @@ let
     writeShellScriptBin "wpcarros-emacs" ''
       export XMODIFIERS=emacs
       export BRIEFCASE=${briefcasePath}
+      export GOOGLE_BRIEFCASE="$HOME/google-briefcase"
       export PATH="${emacsBinPath}:$PATH"
       export EMACSLOADPATH="${loadPath}"
       exec ${emacsBin} \