make delete-old/delete-old-libs issue after r264673 build

After building at -CURRENT amd64 r264673, I got the following errors
running 'make delete-old' and 'make delete-old-libs':

 # make delete-old
make[2]: "/usr/share/mk/bsd.opts.mk" line 239: Could not find bsd.mkopt.mk
make[2]: "/usr/share/mk/bsd.opts.mk" line 262: Malformed conditional
(${MK_LIBPTHREAD} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 266: Malformed conditional
(${MK_LDNS} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 271: Malformed conditional
(${MK_SOURCELESS} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 276: Malformed conditional
(${MK_CDDL} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 281: Malformed conditional
(${MK_CRYPT} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 287: Malformed conditional
(${MK_CXX} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 292: Malformed conditional
(${MK_MAIL} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 298: Malformed conditional
(${MK_NETGRAPH} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 303: Malformed conditional
(${MK_OPENSSL} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 308: Malformed conditional
(${MK_PF} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 312: Malformed conditional
(${MK_TEXTPROC} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 316: Malformed conditional
(${MK_CROSS_COMPILER} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 322: Malformed conditional
(${MK_TOOLCHAIN} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 329: Malformed conditional
(${MK_CLANG} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 352: Malformed conditional
(defined(WITHOUT_${:UBZIP2}_SUPPORT) || ${MK_${:UBZIP2}} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 352: Malformed conditional
(defined(WITHOUT_${:UGNU}_SUPPORT) || ${MK_${:UGNU}} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 352: Malformed conditional
(defined(WITHOUT_${:UINET}_SUPPORT) || ${MK_${:UINET}} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 352: Malformed conditional
(defined(WITHOUT_${:UINET6}_SUPPORT) || ${MK_${:UINET6}} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 352: Malformed conditional
(defined(WITHOUT_${:UKERBEROS}_SUPPORT) || ${MK_${:UKERBEROS}} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 352: Malformed conditional
(defined(WITHOUT_${:UKVM}_SUPPORT) || ${MK_${:UKVM}} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 352: Malformed conditional
(defined(WITHOUT_${:UNETGRAPH}_SUPPORT) || ${MK_${:UNETGRAPH}} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 352: Malformed conditional
(defined(WITHOUT_${:UPAM}_SUPPORT) || ${MK_${:UPAM}} == "no")
make[2]: "/usr/share/mk/bsd.opts.mk" line 352: Malformed conditional
(defined(WITHOUT_${:UWIRELESS}_SUPPORT) || ${MK_${:UWIRELESS}} == "no")
make[2]: "/usr/share/mk/bsd.own.mk" line 129: Malformed conditional
(${MK_CTF} != "no")
make[2]: "/usr/share/mk/bsd.own.mk" line 137: Malformed conditional
(${MK_INSTALL_AS_USER} != "no")
make[2]: Fatal errors encountered -- cannot continuemake[1]:
"/usr/src/Makefile.inc1" line 135: warning: "make -C /usr/src/release -V
REVISION" returned non-zero status
make[2]: "/usr/share/mk/bsd.opts.mk" line 239: Could not find bsd.mkopt.mk

Maybe r26466{1|2|3|4} could be the source?

-Tom