diff --git a/pkgs/tools/nix/nix-output-monitor/default.nix b/pkgs/tools/nix/nix-output-monitor/default.nix
index e0bde4d99119..9b3b0eebd91a 100644
--- a/pkgs/tools/nix/nix-output-monitor/default.nix
+++ b/pkgs/tools/nix/nix-output-monitor/default.nix
@@ -15,6 +15,7 @@
       chmod a+x $out/bin/nom-build
       installShellCompletion --zsh --name _nom-build completions/completion.zsh
     '';
+    mainProgram = "nom";
   };
 in
   justStaticExecutables