diff --git a/default.nix b/default.nix
index 3098b10..806d05c 100644
--- a/default.nix
+++ b/default.nix
@@ -14,6 +14,11 @@ let
 
       preferLocalBuild = true;
       allowSubstitutes = true;
+      passthru = {
+       inherit addonId;
+       inherit pname;
+       inherit version;
+      };
 
       buildCommand = ''
         dst="$out/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}"