#!/home/avp/.guix-profile/bin/guile \
-e main -s
!#

(use-modules (ice-9 streams)
             (ice-9 pretty-print)
             (ssh session)
             (ssh auth)
             (ssh sftp))

(define (main args)
  (let ((session (make-session #:host "example.org"
                               #:user "avp")))
    (connect! session)
    (userauth-agent! session)
    (let* ((sftp-session (make-sftp-session session))
           (stream       (sftp-dir-open-stream sftp-session "/tmp/")))
      (stream-for-each (lambda (attrs)
                         (pretty-print attrs))
                       stream))))

$ guix package -A | wc -l
21296

$ ./pre-inst-env guix lint java-argparse4j
guix: lint: command not found
hint: Did you mean `lint'?

Try `guix --help' for more information.

y = A * sin(2 * PI * f * x + Phi);