error in make

[bycn82]

I think someone messed-up the makefiles,

root at FB10Head:/usr/src/sys/modules/ipfw # make
make: "/usr/src/sys/modules/ipfw/Makefile" line 3: Could not find 
src.opts.mk
make: "/usr/src/sys/modules/ipfw/Makefile" line 24: Malformed 
conditional (${MK_INET_SUPPORT} != "no")
make: "/usr/src/sys/modules/ipfw/Makefile" line 28: Malformed 
conditional (${MK_INET6_SUPPORT} != "no")
make: Fatal errors encountered -- cannot continue
make: stopped in /usr/src/sys/modules/ipfw
root at FB10Head:/usr/src/sys/modules/ipfw # uname -a
FreeBSD FB10Head 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r265307M: Mon May  
5 01:34:11 UTC 2014     root at FB10Head:/usr/obj/usr/src/sys/GENERIC  amd64
root at FB10Head:/usr/src/sys/modules/ipfw # find / -name src.opts.mk
/usr/src/share/mk/src.opts.mk
root at FB10Head:/usr/src/sys/modules/ipfw #