Hi, When I set a mirror in ~/.m2/settings.xml, that mirror is not used by the maven in Guix. To reproduce: mkdir -p ~/.m2/ echo ' internal foo bar nexus nexus http://nexus.example.com/nexus/content/groups/public/ * ' > ~/.m2/settings.xml # run maven somewhere With this setting, maven should run every request through the configured nexus (which in this case means that any try to download should fail). In my setup, maven just ignores this setting and keeps downloading from repo.maven.apache.org which (a) could leak internal information and (b) does not get our internal packages. Best wishes, Arne -- Unpolitisch sein heißt politisch sein ohne es zu merken