guix import pypi

s4cmd.scm

(define-module (s4cmd)
  #:use-module (guix packages)
  #:use-module (guix build-system python)
  #:use-module (guix download))

(package
  (name "python-s4cmd")
  (version "2.1.0")
  (source (origin
            (method url-fetch)
            (uri (pypi-uri "s4cmd" version))
            (sha256
             (base32
              "0d4mx98i3qhvlmr9x898mjvf827smzx6x5ji6daiwgjdlxc60mj2"))))
  (build-system python-build-system)
  (propagated-inputs (list python-boto3 python-pytz))
  (home-page "https://github.com/bloomreach/s4cmd")
  (synopsis "Super S3 command line tool")
  (description "Super S3 command line tool")
  (license #f))

Package was created with guix import pypi s4cmd.
I manually added the define-module at the top.

When trying to use it:

$ guix shell -L . python-s4cmd
error: package: unbound variable
hint: Did you forget `(use-modules (guix packages))'?

guix shell: error: python-s4cmd: unknown package