Hi Arne,
You need to have the following .mumi/config file set up in your guile repo. (Once https://issues.guix.gnu.org/77534 is merged, you won't have to do this manually). $ cd /path/to/guile/repo $ cat .mumi/config ((debbugs-host . "debbugs.gnu.org") (patch-email-address . "bug-gu...@gnu.org") (mumi-host . "issues.guix.gnu.org")) Search for open issues for guile that mention wisp. $ mumi search wisp package:guile is:open Make some issue current. $ mumi current 77534 Apply the latest patchset from that issue. $ mumi am Compose a reply to the current issue. This will use xdg-open to open your configured email client. The To/Cc fields will be automatically populated with all participants of the issue. $ mumi compose Compose emails to the control server. For example, tag the current issue with the confirmed and easy tags. Once again, this will use xdg-open to open your configured email client and populate it with a message template. $ mumi command -t +confirmed -t +easy Many of these commands are documented in https://guix.gnu.org/manual/devel/en/html_node/Debbugs-User-Interfaces.html#Command_002dLine-Interface and also added as a reminder at the bottom of individual issue pages. Hope that helps! Arun