devel/autoconf vs help2man on amd64 -8 and -current?

["John D. Baker" <jdbaker%mylinuxisp.com@localhost>]

After updating to pkgsrc-HEAD, I've run into the following problem
updating "devel/autoconf" on my amd64 netbsd-8 and -current systems:

[...]
--- ./config.guess.1 ---
Updating man page ./config.guess.1
PATH="../tests:../build-aux:$PATH";  export PATH;  /bin/sh /tmp/pkgsrc/devel/autoconf/work/autoconf-2.69/build-aux/missing --run help2man  --include=config.guess.x  --include=./common.x  --source='GNU Autoconf 2.69'  --output=./config.guess.1.t `echo 'config.guess' | sed 's,.*/,,'`
--- ./config.sub.1 ---
Updating man page ./config.sub.1
PATH="../tests:../build-aux:$PATH";  export PATH;  /bin/sh /tmp/pkgsrc/devel/autoconf/work/autoconf-2.69/build-aux/missing --run help2man  --include=config.sub.x  --include=./common.x  --source='GNU Autoconf 2.69'  --output=./config.sub.1.t `echo 'config.sub' | sed 's,.*/,,'`
--- ./config.guess.1 ---
help2man: can't get `--help' info from config.guess
Try `--no-discard-stderr' if option outputs to stderr
--- ./config.sub.1 ---
help2man: can't get `--help' info from config.sub
Try `--no-discard-stderr' if option outputs to stderr
--- ./config.guess.1 ---
*** [./config.guess.1] Error code 1

make[2]: stopped in /tmp/pkgsrc/devel/autoconf/work/autoconf-2.69/man
--- ./config.sub.1 ---
*** [./config.sub.1] Error code 1

make[2]: stopped in /tmp/pkgsrc/devel/autoconf/work/autoconf-2.69/man
2 errors
[...]


My i386 (netbsd-8, -current) and sparc-current machines did not
encounter this problem--only the amd64 machines. 

"help2man" is v1.47.6, updated before the "devel/autoconf" update
attempt (via pkg_rolling-replace).

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