diff --git a/pkgs/by-name/du/duti/package.nix b/pkgs/by-name/du/duti/package.nix
index 4258eaf6303b..769adfbfcbd7 100644
--- a/pkgs/by-name/du/duti/package.nix
+++ b/pkgs/by-name/du/duti/package.nix
@@ -30,6 +30,7 @@ stdenv.mkDerivation {
       a Microsoft Word document has a UTI of com.microsoft.word.doc. Using duti, the
       user can change which application acts as the default handler for a given UTI.
     '';
+    mainProgram = "duti";
     maintainers = with maintainers; [
       n-hass
     ];