1 files changed, 1 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/servers/monitoring/prometheus/postfix-exporter.nix b/nixpkgs/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
index 90439c9091fc..ad85dfb73318 100644
--- a/nixpkgs/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
+++ b/nixpkgs/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
@@ -36,6 +36,7 @@ buildGoModule rec {
   meta = with lib; {
     inherit (src.meta) homepage;
     description = "A Prometheus exporter for Postfix";
+    mainProgram = "postfix_exporter";
     license = licenses.asl20;
     maintainers = with maintainers; [ willibutz globin ];
   };