Cannot Compile Firefox as a PIE

I'm on FreeBSD 11-CURRENT (well, technically, HardenedBSD). I'm trying to compile firefox as a Position-Independent Executable. No matter the approach I take, I get an error. I've filed a bug upstream with Firefox (link below). Is there something else I should be doing? Link to bug report: https:

[package - 84amd64-default][www/libxul] Failed for libxul-31.7.0_1 in stage

You are receiving this mail as a port that you maintain is failing to build on the FreeBSD package build server. Please investigate the failure and submit a PR to fix build. Maintainer: ge...@freebsd.org Last committer: jbe...@freebsd.org Ident: $FreeBSD: head/www/libxul/Makefile 3889