Config inconsistency for firefox-esr on rpi2

[bob prohaska]

In playing with www/firefox-esr on an rpi2 at r343555 using
ports at 493769 make stops with

===>  Configuring for firefox-esr-52.8.0,1
firefox-esr-52.8.0,1: Needs gtk3 with WAYLAND support enabled.
*** Error code 1

despite both wayland and gtk3 being selected in the config dialog.

I've retried several times, the error persists.

Any suggestions?

Thanks for reading,

bob prohaska