Mysterious bulkbuild isue

[Jason Bacon <bacon4000%gmail.com@localhost>]

My bulk builds on CentOS are working well, but I'm running into an issue 
on OS X (El Capitan) and NetBSD 7.

Unfortunately, I'm not finding any good clues in the logs.  Below is 
basically what I'm seeing.  Below that is what I'm appending to the 
default pbulk.conf.

On the Mac, I'm running on bare metal, no chroot.  On NetBSD, I'm using 
a minimal chroot image with /dev, /proc, and /kern null-mounted.

Hoping someone has seen this symptom before and can point me in the 
right direction.

Thanks,

    Jason

[imacs-iMac:/Users/admin] admin# /pbulk/bin/bulkbuild
Warning: All log files of the previous pbulk run will be
removed in 5 seconds. If you want to abort, press Ctrl-C.
Reusing old scan results
Using old scan results from /bulklog.old/meta/pscan
Scanning...
. 1/1
Resolving...
Scanning...
. 1/1
Resolving...
Building...
Initialisation complete.
[1/2] Starting build of  cwrappers-20170112
[1/2] Successfully built cwrappers-20170112
[2/2] Starting build of  digest-20160304
[2/2] Failed to build    digest-20160304
Building pkg_summary...
Building SHA512...
Build reports...
Sending report mail...
Uploading report...
Uploading packages...

[imacs-iMac:/Users/admin] admin# cat /bulklog/digest-20160304/configure.log
Illegal variable name.

There are no errors in the other log files.

pbulk.conf:

################################################################
# Overrides from pkg-dev/pkg-dev-0.1/Scripts/pkg-pbulk-setup

# PATH=/pbulk/bin:/usr/bin:/usr/sbin:/bin:/sbin
# export PATH

# https://pkgsrc.joyent.com/docs/bulk/
# Limit processes to an hour of CPU time.  Anything which takes longer than
# this is most probably broken.
ulimit -t 3600

bootstrapkit=/pbulk/bootstrap.tar.gz
limited_list=/pbulk/etc/pbulk.list
reuse_scan_results=yes
unprivileged_user=root
make=/sharedapps/pkg-2017Q1/bin/bmake
bulklog=/bulklog

# Must be writable by pbulk user
umask 022
packages=/sharedapps/pkgsrc-2017Q1/packages
prefix=/sharedapps/pkg-2017Q1
pkgdb=/sharedapps/pkg-2017Q1/pkgdb
varbase=/sharedapps/pkg-2017Q1/var
pkgsrc=/sharedapps/pkgsrc-2017Q1

# Change to real IP and add IPs of other bulk build machines if desired
master_mode=no

# Change these if mail is enabled
report_subject_prefix="pkgsrc"
report_recipients="pkgsrc-bulk%netbsd.org@localhost"
mail=:

rsync=:

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