diff --git a/nixos/modules/programs/zsh/zsh.nix b/nixos/modules/programs/zsh/zsh.nix
index 63ff34aa286a..879b802a5db6 100644
--- a/nixos/modules/programs/zsh/zsh.nix
+++ b/nixos/modules/programs/zsh/zsh.nix
@@ -249,8 +249,8 @@ in
         setopt ${builtins.concatStringsSep " " cfg.setOptions}
       ''}
 
-      # Alternative method of determining short and full hostname.
-      HOST=${config.networking.fqdnOrHostName}
+      # Determine current fqdn hostname
+      HOST=$(hostname --fqdn)
 
       # Setup command line history.
       # Don't export these, otherwise other shells (bash) will try to use same HISTFILE.