diff --git a/home/config/nil/home.nix b/home/config/nil/home.nix
index 5affa13..30b20d3 100644
--- a/home/config/nil/home.nix
+++ b/home/config/nil/home.nix
@@ -249,9 +249,12 @@ in {
 
         PROMPT_INDICATOR: { "› " }
 
-        SSH_AUTH_SOCK: $"($env.XDG_RUNTIME_DIR)/ssh-agent"
         TMPDIR: $"($env.XDG_RUNTIME_DIR)/tmp"
       }
+
+      if SSH_AUTH_SOCK not-in $env {
+        $env.SSH_AUTH_SOCK = $"(env.XDG_RUNTIME_DIR)/ssh-agent"
+      }
     '';
 
     configFile.text = ''