unkown option "THRWORKQ"

So I'm trying to use the newer libDispatch, http://people.freebsd.org/~sson/thrworkq/. So I checked out FreeBSD 10-RELEASE with svn to /usr/src. I applied the patches to the source, and added options THRWORKQ to the kernel Makefile like the README says. But when I try to build the kernel I get:
Code:
/usr/src/sys/amd64/conf/BLACKBOX: unknown option "THRWORKQ"
*** Error code 1

I couldn't find anything online about how to fix it. Any help would be appreciated.
 
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