/usr/lib/ruby/3.3.0/rubygems.rb:259:in `find_spec_for_exe': can't find gem rackup (>= 0.a) with executable rackup (Gem::GemNotFoundException)
	from /usr/lib/ruby/3.3.0/rubygems.rb:278:in `activate_bin_path'
	from /usr/bin/rackup:25:in `<main>'