diff --git a/lib/default.nix b/lib/default.nix
index 7e1b276..d551451 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -29,5 +29,7 @@ lib.makeExtensible (self:
       replaceStrings
         [ "." ] [ "" ]
         (strings.sanitizeDerivationName (removePrefix "/" name));
+
+    getMainProgram = package: "${package}/bin/${attrByPath ["meta" "mainProgram"] package.pname package}";
   }
 )