diff --git a/home/jonas/yubikey.nix b/home/jonas/yubikey.nix
index e08afb7..a0ed340 100644
--- a/home/jonas/yubikey.nix
+++ b/home/jonas/yubikey.nix
@@ -20,6 +20,6 @@
     '';
   };
   home.sessionVariables = {
-    SSH_AUTH_SOCK = "\${SSH_AUTH_SOCK:-$XDG_RUNTIME_DIR/gnupg/S.gpg-agent.ssh}";
+    SSH_AUTH_SOCK = "$XDG_RUNTIME_DIR/gnupg/S.gpg-agent.ssh";
   };
 }