diff --git a/pkgs/development/tools/jo/default.nix b/pkgs/development/tools/jo/default.nix
index 4145fca812c9..06c4fa6477ff 100644
--- a/pkgs/development/tools/jo/default.nix
+++ b/pkgs/development/tools/jo/default.nix
@@ -18,6 +18,7 @@ stdenv.mkDerivation rec {
   meta = with lib; {
     description = "A small utility to create JSON objects";
     homepage = "https://github.com/jpmens/jo";
+    mainProgram = "jo";
     license = licenses.gpl2Plus;
     maintainers = [maintainers.markus1189];
     platforms = platforms.all;