diff --git a/pkgs/servers/monitoring/prometheus/wireguard-exporter.nix b/pkgs/servers/monitoring/prometheus/wireguard-exporter.nix
index d810633c17f3..a1e9ee7f434e 100644
--- a/pkgs/servers/monitoring/prometheus/wireguard-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/wireguard-exporter.nix
@@ -27,5 +27,6 @@ rustPlatform.buildRustPackage rec {
     homepage = "https://github.com/MindFlavor/prometheus_wireguard_exporter";
     license = licenses.mit;
     maintainers = with maintainers; [ ma27 globin ];
+    mainProgram = "prometheus_wireguard_exporter";
   };
 }