On Sat, 30 Mar 2019, Raghav Gururajan wrote:

> Hello Guix!
>
> When I click "Apply" at the last step of "Add Account Wizard", I am getting the error "The name org.gnome.evolution.dataserver.Sources5 was not provided by any .service files".

This issue has been discussed further in #35267:
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=35267

If you're running Guix System and GDM, the solution for now is to
install evolution-data-server into your system packages with something
like this in your operating system config:

  (packages (append
    (list evolution-data-server)
    %base-packages))

Regards,
Ben