Use of "make" broken in src?

[Darren Reed <darrenr%netbsd.org@localhost>]

In a recent change, my ability to do "make" in a single directory has 
been replaced
with the errors below and I've been forced to use "build.sh" to test any 
changes.

Does anyone have any insights into this?

Darren

/usr/src/src/sys/sys/param.h:242:0: error: "ALIGNBYTES" redefined
//usr/include/machine/param.h:65:0: note: this is the location of the 
previous definition