Vagrant Cascadian <vagrant@debian.org> writes:

> Add new package definition for python-libusb1, needed to upgrade
> python-trezor to newer versions.

Thanks!  I have some minor nitpicks:

[...]

> * gnu/packages/libusb.scm (python-libusb1): New variable.

Can you also add yourself to the copyright header in this file?

[...]
  
> +(define-public python-libusb1
> +  (package
> +    (name "python-libusb1")
> +    (version "1.6.4")
> +    (source
> +     (origin
> +       (method url-fetch)
> +       (uri (pypi-uri "libusb1" version))
> +       (sha256
> +        (base32
> +         "03b7xrz8vqg8w0za5r503jhcmbd1ls5610jcja1rqz833nf0v4wc"))))
> +    (build-system python-build-system)
> +    (arguments
> +     `(#:modules ((srfi srfi-1)
> +                  (srfi srfi-26)

Is srfi-26 actually used here?

> +                  (guix build utils)
> +                  (guix build python-build-system))
> +       #:phases
> +       (modify-phases %standard-phases
> +         (add-after 'unpack 'fix-libusb-reference
> +           (lambda* (#:key inputs #:allow-other-keys)
> +             (substitute* "usb1/libusb1.py"
> +               (("libusb_path = ctypes.util.find_library\\(base_name\\)")
> +                (string-append
> +                 "libusb_path = \""
> +                 (find (negate symbolic-link?)
> +                       (find-files (assoc-ref inputs "libusb")
> +                                   "^libusb.*\\.so\\..*"))
> +                 "\"")))
> +             #t)))))
> +    (inputs `(("libusb" ,libusb)))
> +    (home-page
> +     "http://github.com/vpelletier/python-libusb1")

This line break is unnecessary :-)

> +    (synopsis "Pure-python wrapper for libusb-1.0")
> +    (description
> +     "Pure-python wrapper for libusb-1.0")

This description is rather thin.  Can you try to make it into one or
more full sentences?

> +    (license lgpl2.1+)))

I noticed the source contains GPL2 in COPYING, and LGPL2.1 as
"COPYING.LESSER".  Can you make sure we don't install the former?

Can you send an updated patch?  Thanks in advance!