Gnumeric is correctly autogenned together with GOffice, so that the necesary GOffice version is available when a new version of Gnumeric gets autogenned.

The deps in the template, however, don't get automatically updated and if when you try an upgrade, Portage will check that the "required" x11-libs/goffice is already on the system and will proceed to emerge app-office/gnumeric without the really necessary minimal version of x11-libs/goffice, resulting in brekage at configure phase.

The currently issue can be fixed by simply updating the template to require the currently autogerated GOffice version, which is 0.10.53, but ideally the autogen should somehow know what the required GOffice version is and update the autogenerated app-office/gnumeric ebuild accordingly.