5.3-BETA7 make release "env: not found" errors

First-time release wrangler here, so it's quite possible this is a pilot
error, but why do I see "env: not found" errors during make release?


smradoch_at_wally ~ 1017:0 > grep -FB1 'env: not found' release.log 
cd /usr/src; MAKEOBJDIRPREFIX=/usr/obj  MACHINE_ARCH=i386  MACHINE=i386  CPUTYPE=  GROFF_BIN_PATH=/usr/obj/usr/src/i386/legacy/usr/bin  GROFF_FONT_PATH=/usr/obj/usr/src/i386/legacy/usr/share/groff_font  GROFF_TMAC_PATH=/usr/obj/usr/src/i386/legacy/usr/share/tmac  PATH=/usr/obj/usr/src/i386/legacy/usr/sbin:/usr/obj/usr/src/i386/legacy/usr/bin:/usr/obj/usr/src/i386/legacy/usr/games:/usr/obj/usr/src/i386/usr/sbin:/usr/obj/usr/src/i386/usr/bin:/usr/obj/usr/src/i386/usr/games:/tmp/install.9FQf5F4J make -f Makefile.inc1 reinstall
env: not found
--
cd /usr/src; make -f Makefile.inc1 hierarchy
env: not found
--
cd /usr/src; make -f Makefile.inc1 install
env: not found
--
cd /usr/src; MAKEOBJDIRPREFIX=/usr/obj  MACHINE_ARCH=i386  MACHINE=i386  CPUTYPE=  GROFF_BIN_PATH=/usr/obj/usr/src/i386/legacy/usr/bin  GROFF_FONT_PATH=/usr/obj/usr/src/i386/legacy/usr/share/groff_font  GROFF_TMAC_PATH=/usr/obj/usr/src/i386/legacy/usr/share/tmac  PATH=/usr/obj/usr/src/i386/legacy/usr/sbin:/usr/obj/usr/src/i386/legacy/usr/bin:/usr/obj/usr/src/i386/legacy/usr/games:/usr/obj/usr/src/i386/usr/sbin:/usr/obj/usr/src/i386/usr/bin:/usr/obj/usr/src/i386/usr/games:/tmp/install.ApkrC6vH make -f Makefile.inc1 redistribute
env: not found
--
cd /usr/src; make -f Makefile.inc1 distribute
env: not found
smradoch_at_wally ~ 1018:0 > cd /usr/src/release/ 

I have env(1) these locations:

/usr/obj/usr/src/usr.bin/env/env

/usr/release/usr/bin/env
/usr/release/usr/obj/usr/src/usr.bin/env/env
/usr/release/R/stage/trees/base/usr/bin/env
/usr/release/R/cdrom/disc2/usr/bin/env

as you can see, none of the locations is listed in the PATH assignments above.

make is being called like this:

make release \ 
    BUILDNAME=5.3-ZCROS \
    CHROOTDIR=/usr/release \
    CVSROOT=/home/ncvs \
    EXTSRCDIR=/usr/src \
    RELEASETAG=RELENG_5_3 \
    KERNEL_FLAGS=-j8 \
    WORLD_FLAGS=-j8 \
    -DNODOC \
    -DNOPORTS

/etc/make.conf contains this (and nothing more):

PERL_VER=5.8.5
PERL_VERSION=5.8.5
PERL_ARCH=mach
NOPERL=yo
NO_PERL=yo
NO_PERL_WRAPPER=yo


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