x11-servers/xorg-server-1.7.7_6, 1: build breaks because of the error: X11/dri/xf86driproto.h: No such file or directory

[Yuri]

Recently I am getting this error message, see log below.
Expected by build file X11/dri/xf86driproto.h doesn't exist, instead 
there exists the file /usr/local/include/X11/extensions/dri2proto.h 
installed by dri2proto-2.6.

Yuri

--- log ---
Making all in glx
   CC    glxdri.o
glxdri.c:46:34: error: X11/dri/xf86driproto.h: No such file or directory
In file included from glxdri.c:49:
../hw/xfree86/dri/dri.h:41:21: error: xf86dri.h: No such file or directory
glxdri.c: In function '__glXDRIscreenProbe':
glxdri.c:993: error: 'XF86DRI_MAJOR_VERSION' undeclared (first use in 
this function)
glxdri.c:993: error: (Each undeclared identifier is reported only once
glxdri.c:993: error: for each function it appears in.)
glxdri.c:994: error: 'XF86DRI_MINOR_VERSION' undeclared (first use in 
this function)
glxdri.c:995: error: 'XF86DRI_PATCH_VERSION' undeclared (first use in 
this function)
gmake[1]: *** [glxdri.lo] Error 1
gmake: *** [all-recursive] Error 1
*** [do-build] Error code 1

Stop in /usr/ports/x11-servers/xorg-server.
*** [build] Error code 1