diff --git a/pkgs/by-name/pr/prometheus-libvirt-exporter/package.nix b/pkgs/by-name/pr/prometheus-libvirt-exporter/package.nix
index 2f6862ac6dcd..97d8506cc77c 100644
--- a/pkgs/by-name/pr/prometheus-libvirt-exporter/package.nix
+++ b/pkgs/by-name/pr/prometheus-libvirt-exporter/package.nix
@@ -30,5 +30,6 @@ buildGoModule (finalAttrs: {
     homepage = "https://github.com/Tinkoff/libvirt-exporter";
     license = lib.licenses.asl20;
     maintainers = [ ];
+    mainProgram = "libvirt-exporter";
   };
 })