diff --git a/home/xonsh.nix b/home/xonsh.nix
index 61352b1..1fe2b23 100644
--- a/home/xonsh.nix
+++ b/home/xonsh.nix
@@ -119,7 +119,7 @@ builtins.true = True
 builtins.false = False
 builtins.null = None
 
-if not $__NIX_DARWIN_SET_ENVIRONMENT_DONE:
+if  '__NIX_DARWIN_SET_ENVIRONMENT_DONE' not in ''${...} or not $__NIX_DARWIN_SET_ENVIRONMENT_DONE:
     source-bash /etc/bashrc
 '';
 	};