diff --git a/pkgs/development/tools/gir/default.nix b/pkgs/development/tools/gir/default.nix
index 856cd44e26c0..2d1cdfc546b2 100644
--- a/pkgs/development/tools/gir/default.nix
+++ b/pkgs/development/tools/gir/default.nix
@@ -19,5 +19,6 @@ rustPlatform.buildRustPackage rec {
     homepage = "https://github.com/gtk-rs/gir/";
     license = with licenses; [ mit ];
     maintainers = with maintainers; [ ekleog ];
+    mainProgram = "gir";
   };
 }