diff --git a/pkgs/by-name/se/sendgmail/package.nix b/pkgs/by-name/se/sendgmail/package.nix
index b735fd70c96c..11b38387fae3 100644
--- a/pkgs/by-name/se/sendgmail/package.nix
+++ b/pkgs/by-name/se/sendgmail/package.nix
@@ -27,5 +27,6 @@ buildGoModule {
     maintainers = [ lib.maintainers.samw ];
     license = lib.licenses.asl20;
     platforms = lib.platforms.unix;
+    mainProgram = "sendgmail";
   };
 }