diff --git a/services/code-server.nix b/services/code-server.nix
index 37f64e3..1b0da06 100644
--- a/services/code-server.nix
+++ b/services/code-server.nix
@@ -30,7 +30,7 @@
     system.activationScripts.claude-code-firefox-fix.text = ''
       for f in /home/fred/.local/share/code-server/extensions/anthropic.claude-code-*/extension.js; do
         [ -f "$f" ] && ${pkgs.gnused}/bin/sed -i \
-          's|<link href="${q}" rel="stylesheet">|<link href="${q}" rel="stylesheet" crossorigin="anonymous">|' \
+          's|<link href="''${q}" rel="stylesheet">|<link href="''${q}" rel="stylesheet" crossorigin="anonymous">|' \
           "$f"
       done
     '';