buildkernel doesn't respect PORTSDIR with PORTS_MODULES

[Nuno Teixeira]

Hello,

I'm trying PORT_MODULES with make.conf:
---
PORTSDIR=/work/freebsd/ports
DISTDIR=/work/DISTFILES
PORTS_MODULES=graphics/drm-kmod x11/nvidia-driver
---
and `make buildkernel` fails:
---
linking kernel.full
ctfmerge -L VERSION -g -o kernel.full ...
      text      data       bss        dec         hex   filename
  22977071   1848409   4437760   29263240   0x1be8588   kernel.full
cd: /usr/ports/graphics/drm-kmod: No such file or directory
---

Any hint?
Thanks,

-- 
Nuno Teixeira
FreeBSD Committer (ports)