=> Bootstrap dependency digest>=20010302: found digest-20160304
===> Building for squashfs-4.3
cd /usr/pkgsrc/work/filesystems/squashfs/work/squashfs4.3/squashfs-tools && env EXTRA_LDFLAGS="-Wl,-R/usr/pkg/lib"  /usr/pkg/bin/gmake GZIP_SUPPORT=1 LZO_SUPPORT=1 XZ_SUPPORT=1
gmake[2]: Entering directory '/usr/pkgsrc/work/filesystems/squashfs/work/squashfs4.3/squashfs-tools'
cc -O2  -I. -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_GNU_SOURCE -DCOMP_DEFAULT=\"gzip\" -Wall -DGZIP_SUPPORT -DXZ_SUPPORT -DLZO_SUPPORT -DXATTR_SUPPORT -DXATTR_DEFAULT   -c -o mksquashfs.o mksquashfs.c
mksquashfs.c:47:10: fatal error: 'pthread.h' file not found
#include <pthread.h>
         ^
1 error generated.
<builtin>: recipe for target 'mksquashfs.o' failed
gmake[2]: *** [mksquashfs.o] Error 1
gmake[2]: Leaving directory '/usr/pkgsrc/work/filesystems/squashfs/work/squashfs4.3/squashfs-tools'
*** Error code 2

Stop.
bmake[1]: stopped in /usr/pkgsrc/filesystems/squashfs
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/filesystems/squashfs