bug#67048: guix refresh -u -L does not work with relative path

[Andreas Enge <andreas@enge.fr>]

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Hello,

to reproduce this weird (and very specific!) problem, do the following:
   cd /tmp
   mkdir proj
copy the attached example.scm into /tmp/proj

Now
   guix refresh -u -L proj python-numpy-illustrated
yields the error
proj/example.scm:10:2: python-numpy-illustrated: updating from version 0.3 to version 0.3.1...
proj/example.scm:10:2: warning: python-numpy-illustrated: no `version' field in source; skipping
and does not update the package; whereas
   guix refresh -u -L /tmp/proj python-numpy-illustrated
works as expected.

Without the "-u" things work with a relative path (as indicated by the
first line before the error message above), and I have not found other
guix commands that pose problems with relative paths.

Andreas


[-- Attachment #2: example.scm --]
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(define-module (example)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix download)
  #:use-module (guix packages)
  #:use-module (guix build-system pyproject)
  #:use-module (guix build-system python)
  #:use-module (gnu packages python-xyz))

(define-public python-numpy-illustrated
  (package
    (name "python-numpy-illustrated")
    (version "0.3.1")
    (source
     (origin
       (method url-fetch)
       (uri (pypi-uri "numpy-illustrated" version))
       (sha256
        (base32 "0s7ki6lm9xwd4pj7rx6al230wbywqk11wjvgdk44lbdq2fz7kfxd"))))
    (build-system pyproject-build-system)
    (propagated-inputs (list python-numpy))
    (home-page "https://github.com/axil/numpy-illustrated")
    (synopsis "Helper functions from the NumPy Illustrated guide")
    (description "This package provides helper functions for the
@url{https://betterprogramming.pub/numpy-illustrated-the-visual-guide-to-numpy-3b1d4976de1d?sk=57b908a77aa44075a49293fa1631dd9b,
NumPy Illustrated} programming guide.")
    (license license:expat)))