make world

[lc]

I've downloaded and installed the tgz archives needed for Xserver
make World, gives me:
make[3]: Entering directory /disk/al1/Xorg/build/nls/XI18N_OBJS'
rm -f *.CKP *.ln *.BAK *.bak *.o core errs ,* *~ *.a .emacs_* tags TAGS
make.log MakeOut   "#"*
make[3]: Leaving directory /disk/al1/Xorg/build/nls/XI18N_OBJS'
make[2]: Leaving directory /disk/al1/Xorg/build/nls'
cleaning in ./programs...
make[2]: Entering directory /disk/al1/Xorg/build/programs'
make[2]: *** No rule to make target clean'.  Stop.
make[2]: Leaving directory /disk/al1/Xorg/build/programs'
make[1]: *** [clean] Error 2
make[1]: Leaving directory /disk/al1/Xorg/build'
make: *** [World] Error 2

I have to change
         SUBDIRS = include config lib $(NLSSUBDIR) \
                   programs $(FONTSDIR) $(DOCSDIR)
to
         SUBDIRS = include config lib $(NLSSUBDIR) \
                   programs/Xserver $(FONTSDIR) $(DOCSDIR)
in xc/Imakefile
So I managed to build.
What is wrong?

Thanks
Leopoldo Cerbaro
PS
The system is
Linux, kernel 2.6.9, arch i686, Debian