I want to define new syntax. If I define it without a library, just (define-syntax sample1 (syntax-rules (:times) [(_ n :times body ...) (list n (sample1 body ...))] [(c body ...) ...

Using Chez Scheme, I tried to capture the output of an external command into a string port (see https://www.scheme.com/csug8/io.html): (define output (with-output-to-string (lambda () (system "...