Build broken on Windows

Hi,

I get:
$ make
make  all-recursive
make[1]: Entering directory `/mono/mono'
Making all in po
make[2]: Entering directory `/mono/mono/po'
Making all in mcs
make[3]: Entering directory `/mono/mono/po/mcs'
test ! -f ./mcs.pot || \
           test -z "es.gmo ja.gmo de.gmo" || make es.gmo ja.gmo de.gmo
make[4]: Entering directory `/mono/mono/po/mcs'
rm -f es.gmo && : -c --statistics -o es.gmo es.po
mv: cannot stat `t-es.gmo': No such file or directory
make[4]: *** [es.gmo] Error 1
make[4]: Leaving directory `/mono/mono/po/mcs'
make[3]: *** [stamp-po] Error 2
make[3]: Leaving directory `/mono/mono/po/mcs'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/mono/mono/po'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/mono/mono'
make: *** [all] Error 2

Do I miss some packages or how am I supposed to avoid this?

Thanks.

Kornél