Subject: bug#68967: guix import: Issues handling Unicode

From: Tomás Ortín <[email-masked]>
Date: Wed, 7 Feb 2024 12:29:20 +0100

"guix import" seems to have issues when importing text encoded in some 
non-ascii characters (or at least in Chinese).
As an example to reproduce, this is the output generated by "guix import 
pypinyin":

```
(package
   (name "python-pypinyin")
   (version "0.50.0")
   (source
    (origin
      (method url-fetch)
      (uri (pypi-uri "pypinyin" version))
      (sha256
       (base32 "1yw075j7hjp1kc1jdihp4yq3jd5jpp7grzm5mh1d3fkqkd5prrvj"))))
   (build-system pyproject-build-system)
   (propagated-inputs (list python-enum34 python-typing))
   (home-page "https://github.com/mozillazg/python-pinyin")
   (synopsis "æ±å­æ¼é³è½¬æ¢æ¨¡å/å·¥å·.")
   (description "æ±å­æ¼é³è½¬æ¢æ¨¡å/å·¥å·.")
   (license license:expat))
```