diff --git a/pkgs/tools/security/pinentry/mac.nix b/pkgs/tools/security/pinentry/mac.nix
index d824a816dc90..4620aedecc75 100644
--- a/pkgs/tools/security/pinentry/mac.nix
+++ b/pkgs/tools/security/pinentry/mac.nix
@@ -85,5 +85,6 @@ stdenv.mkDerivation rec {
     license = lib.licenses.gpl2Plus;
     homepage = "https://github.com/GPGTools/pinentry-mac";
     platforms = lib.platforms.darwin;
+    mainProgram = passthru.binaryPath;
   };
 }