This program fails to run. I attach a patch that makes it work. SYSTEM INFORMATION Guix system with the following Guix. Generation 55 Apr 18 2022 11:42:09 (current) guix 237d90a repository URL: https://git.savannah.gnu.org/git/guix.git branch: master commit: 237d90a7808cfdced34b34595eba16632cbcb89e STEPS TO REPRODUCE guix shell gfeeds -- gfeeds Traceback (most recent call last): File "/gnu/store/8vbjfdq9dv8cscs28vq9iabmkz4zkqcg-gfeeds-0.16.2/bin/.gfeeds-real", line 64, in gi.require_version('WebKit2', '4.0') File "/home/yo/.guix-profile/lib/python3.9/site-packages/gi/__init__.py", line 129, in require_version raise ValueError('Namespace %s not available for version %s' % ValueError: Namespace WebKit2 not available for version 4.0 ADDITIONAL INFORMATION The problem seems to be that the current inputs of gfeeds don't provide WebKit2 4.0 but WebKit 4.1: ❯ guix shell python-pygobject webkitgtk yo@gnu[env]: ~❯ python3 Python 3.9.9 (main, Jan 1 1970, 00:00:01) [GCC 10.3.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import gi >>> >>> # The following fails. >>> gi.require_version("WebKit2", "4.0") Traceback (most recent call last): File "", line 1, in File "/home/yo/.guix-profile/lib/python3.9/site-packages/gi/__init__.py", line 129, in require_version raise ValueError('Namespace %s not available for version %s' % ValueError: Namespace WebKit2 not available for version 4.0 >>> >>> >>> # But the following works. >>> gi.require_version("WebKit2", "4.1") >>> POSSIBLE SOLUTION I attach a patch that makes the program import WebKit 4.1 instead. This makes the program work. As far as I could see, there is no package in Guix that provides WebKit 4.0, so I left the inputs untouched. Another option was to upgrade gfeeds to the latest (v1.0.2), but it required to package new libraries that are not available in Guix (a recent libadwaita, for example), and which I'm not able to package. Best, --- Luis Felipe López Acevedo https://luis-felipe.gitlab.io/