For some reason make extract doesn't seem to be called:

# make build
===> Checking for vulnerabilities in MesaLib-6.4.2nb2
=> Required installed package digest>=20010302: digest-20060302 found
=> Checksum SHA1 OK for Mesa-6.4.2/MesaLib-6.4.2.tar.bz2
=> Checksum SHA1 OK for Mesa-6.4.2/MesaGLUT-6.4.2.tar.bz2
=> Checksum SHA1 OK for Mesa-6.4.2/MesaDemos-6.4.2.tar.bz2
=> Checksum RMD160 OK for Mesa-6.4.2/MesaLib-6.4.2.tar.bz2
=> Checksum RMD160 OK for Mesa-6.4.2/MesaGLUT-6.4.2.tar.bz2
=> Checksum RMD160 OK for Mesa-6.4.2/MesaDemos-6.4.2.tar.bz2
work -> /var/obj/pkg/graphics/MesaLib/work
===> Installing dependencies for MesaLib-6.4.2nb2
=> Required installed package libtool-base>=1.5.18nb5: libtool-base-1.5.22nb3 found
=> Required installed package xorg-imake>=6.8: xorg-imake-6.9.0nb3 found
=> Required installed package xorg-libs>=6.9.0nb2: xorg-libs-6.9.0nb4 found
===> Overriding tools for MesaLib-6.4.2nb2
===> Creating toolchain wrappers for MesaLib-6.4.2nb2
===> Building for MesaLib-6.4.2nb2
cd /var/obj/pkg/graphics/MesaLib/work/Mesa-6.4.2 && /bin/rm -fr src/glu src/glut progs
cd: can't cd to /var/obj/pkg/graphics/MesaLib/work/Mesa-6.4.2
*** Error code 2


# make clean ; make extract
===> Cleaning for MesaLib-6.4.2nb2
===> Checking for vulnerabilities in MesaLib-6.4.2nb2
=> Required installed package digest>=20010302: digest-20060302 found
=> Checksum SHA1 OK for Mesa-6.4.2/MesaLib-6.4.2.tar.bz2
=> Checksum SHA1 OK for Mesa-6.4.2/MesaGLUT-6.4.2.tar.bz2
=> Checksum SHA1 OK for Mesa-6.4.2/MesaDemos-6.4.2.tar.bz2
=> Checksum RMD160 OK for Mesa-6.4.2/MesaLib-6.4.2.tar.bz2
=> Checksum RMD160 OK for Mesa-6.4.2/MesaGLUT-6.4.2.tar.bz2
=> Checksum RMD160 OK for Mesa-6.4.2/MesaDemos-6.4.2.tar.bz2
work -> /var/obj/pkg/graphics/MesaLib/work
===> Installing dependencies for MesaLib-6.4.2nb2
=> Required installed package libtool-base>=1.5.18nb5: libtool-base-1.5.22nb3 found
=> Required installed package xorg-imake>=6.8: xorg-imake-6.9.0nb3 found
=> Required installed package xorg-libs>=6.9.0nb2: xorg-libs-6.9.0nb4 found
===> Overriding tools for MesaLib-6.4.2nb2
===> Creating toolchain wrappers for MesaLib-6.4.2nb2
===> Extracting for MesaLib-6.4.2nb2



-- 
 			   David Brownlee -- abs@absd.org