--- a/langkit/templates/mains_project_file.mako	2020-06-09 09:34:36.677265457 +0200
+++ b/langkit/templates/mains_project_file.mako	2020-06-09 09:35:30.569451995 +0200
@@ -40,4 +40,7 @@
       for Switches ("ada") use ("-E");
    end Binder;
 
+   package Linker is
+      for Switches ("ada") use ("-lgnat", "-lgnarl");
+   end Linker;
 end Mains;