make error building rtems under cygwin

[Chris Stich]

Hello,
I'm one step closer to my rtems, but now I got this error.
After configure I started make all:

<...snap>
Making preinstall in unix
gmake[7]: Entering directory
`/home/pecos/build-rtems/c/posix/exec/score/cpu/uni
x'
Makefile:605: *** multiple target patterns.  Stop.
gmake[7]: Leaving directory
`/home/pecos/build-rtems/c/posix/exec/score/cpu/unix
'
gmake[6]: *** [preinstall-recursive] Error 1
gmake[6]: Leaving directory
`/home/pecos/build-rtems/c/posix/exec/score/cpu'
gmake[5]: *** [preinstall-recursive] Error 1
gmake[5]: Leaving directory `/home/pecos/build-rtems/c/posix/exec/score'
gmake[4]: *** [preinstall-recursive] Error 1
gmake[4]: Leaving directory `/home/pecos/build-rtems/c/posix/exec'
gmake[3]: *** [preinstall-recursive] Error 1
gmake[3]: Leaving directory `/home/pecos/build-rtems/c/posix'
gmake[2]: *** [posix] Error 1
gmake[2]: Leaving directory `/home/pecos/build-rtems/c'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory `/home/pecos/build-rtems/c'
make: *** [all-recursive] Error 1

Does anyone have an idea?
At the moment I use rtems snapshot 220100, cygwin 1.1.8 and Window 2k.
Kind regards, Chris