diff --git a/backup.nix b/backup.nix
index 32a053e..b542aff 100644
--- a/backup.nix
+++ b/backup.nix
@@ -20,7 +20,7 @@ let
   notifyError = pkgs.writeShellApplication {
     name = "notify-error";
 
-    runtimeInputs = [ pkgs.sendmail ];
+    runtimeInputs = [ pkgs.system-sendmail ];
 
     text = ''
       from="$1"