Sandwich STDIN and ARGV

gistfile1.sh

#Setup:
git pull git://github.com/sometimesfood/sandwich.git
cd sandwich
rake gem:build
bundle install --path=vendor/bundle

#These work:
echo 'file "/tmp/blubb" do content "blubb";end'|bundle exec sandwich
echo 'file "/tmp/blubb" do content ARGV.join;end'|bundle exec sandwich /dev/stdin bla blubb

cat /tmp/blubb

#These fails with "sandwich: No such file or directory"
echo 'file "/tmp/blubb" do content ARGV.join;end'|bundle exec sandwich bla blubb
echo 'file "/tmp/blubb" do content ARGV.join;end'|bundle exec sandwich - bla blubb