[9fans] Can't "mk CONF=9pcdisk" --> gives error "rc: #d/0:

[kalaracey]

I'm in /sys/src/9/pc and I type

`mk CONF=9pcdisk`

and rc gives me the error "rc: #d/0: token '=': syntax error".

Why is this? Just doing mk works fine (I think).

Thanks! Plan9 looks very cool... just finished reading through intro (all of 
it).