RPM will not build, when choosing both skip_x11_askpass and skip_gnome_askpass, because of missing condition around Source1.
Created attachment 1739 [details] openssh-askpass-spec.patch Add conditional around the source for ssh-askpass.
Thanks for the report, this has been fixed and will be in 5.4
With the release of 5.4p1, this bug is now considered closed.