samba - Mar 2013 - I am having problems installing the latest samba4 git checkout as of 3/30/13

I am having problems installing the latest samba4 git checkout as of 3/30/13
I keep getting this error message when trying to install samba4
it says:

checking project rules ...
Project rules pass
[   1/4152] Generating replace.vscript
[   2/4152] Generating interfaces.vscript
[   3/4152] Generating talloc.vscript
[   4/4152] Generating pytalloc-util.vscript
[   5/4152] Generating tevent.vscript
[   6/4152] Generating addns.vscript
[   7/4152] Generating ccan.vscript
[   8/4152] Generating tdb.vscript
[   9/4152] Generating tdb_compat.vscript
[  10/4152] Generating ntdb.vscript
[  11/4152] Generating pyldb-util.vscript
[  12/4152] Generating ldb.vscript
Traceback (most recent call last):
  File "./buildtools/bin/waf", line 76, in <module>
    Scripting.prepare(t, cwd, VERSION, wafdir)
  File "/root/samba-master/buildtools/wafadmin/Scripting.py", line
145, in
prepare
    prepare_impl(t, cwd, ver, wafdir)
  File "/root/samba-master/buildtools/wafadmin/Scripting.py", line
135, in
prepare_impl
    main()
  File "/root/samba-master/wscript", line 281, in main
    wildcard_main(wildcard_cmd)
  File "./buildtools/wafsamba/samba_wildcard.py", line 110, in
wildcard_main
    fun(ctx)
  File "/root/samba-master/buildtools/wafadmin/Scripting.py", line
355, in
install
    build_impl(bld)
  File "/root/samba-master/buildtools/wafadmin/Scripting.py", line
408, in
build_impl
    info("Waf: Leaving directory `%s'" % bld.bldnode.abspath())
  File "/root/samba-master/buildtools/wafadmin/Node.py", line 420, in
abspath
    ret = self.__class__.bld.cache_node_abspath[variant].get(self.id, None)
AttributeError: 'NoneType' object has no attribute
'cache_node_abspath'
make: *** [install] Error 1

Please someone help me with this error.