Environment: Python 3.1.2, MacOSX 10.6.4

% python3.1 waf --download configure
  ./set_options()
  ./init()
  ./configure()
Checking for program gcc or cc           : gcc -m32 
Checking for program cpp                 : /usr/bin/cpp 
Checking for program ar                  : /usr/bin/ar 
Checking for program ranlib              : /usr/bin/ranlib 
Checking for gcc                         : ok  
Checking for program python              : /Library/Frameworks/Python.framework/Versions/3.1/Resources/Python.app/Contents/MacOS/Python 
Checking for Python version >= 3.1.0     : ok 3.1.2 
Traceback (most recent call last):
  File "/Local/Build/Python/pycairo-1.8.10/.waf3-1.5.18-a7b91e2a913ce55fa6ecdf310df95752/wafadmin/Utils.py", line 446, in recurse
    txt=readf(file_path,m='rU')
  File "/Local/Build/Python/pycairo-1.8.10/.waf3-1.5.18-a7b91e2a913ce55fa6ecdf310df95752/wafadmin/Utils.py", line 409, in readf
    f=open(fname,m)
IOError: [Errno 2] No such file or directory: '/Local/Build/Python/pycairo-1.8.10/wscript_configure'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Local/Build/Python/pycairo-1.8.10/.waf3-1.5.18-a7b91e2a913ce55fa6ecdf310df95752/wafadmin/Configure.py", line 105, in check_tool
    module=Utils.load_tool(tool,tooldir)
  File "/Local/Build/Python/pycairo-1.8.10/.waf3-1.5.18-a7b91e2a913ce55fa6ecdf310df95752/wafadmin/Utils.py", line 404, in load_tool
    return __import__(tool)
  File "/Local/Build/Python/pycairo-1.8.10/.waf3-1.5.18-a7b91e2a913ce55fa6ecdf310df95752/wafadmin/Tools/osx.py", line 68
    apptask.chmod=0755
                     ^
SyntaxError: invalid token

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "waf", line 158, in <module>
    Scripting.prepare(t, cwd, VERSION, wafdir)
  File "/Local/Build/Python/pycairo-1.8.10/.waf3-1.5.18-a7b91e2a913ce55fa6ecdf310df95752/wafadmin/Scripting.py", line 105, in prepare
    prepare_impl(t,cwd,ver,wafdir)
  File "/Local/Build/Python/pycairo-1.8.10/.waf3-1.5.18-a7b91e2a913ce55fa6ecdf310df95752/wafadmin/Scripting.py", line 98, in prepare_impl
    main()
  File "/Local/Build/Python/pycairo-1.8.10/.waf3-1.5.18-a7b91e2a913ce55fa6ecdf310df95752/wafadmin/Scripting.py", line 133, in main
    fun(ctx)
  File "/Local/Build/Python/pycairo-1.8.10/.waf3-1.5.18-a7b91e2a913ce55fa6ecdf310df95752/wafadmin/Scripting.py", line 172, in configure
    conf.sub_config([''])
  File "/Local/Build/Python/pycairo-1.8.10/.waf3-1.5.18-a7b91e2a913ce55fa6ecdf310df95752/wafadmin/Configure.py", line 155, in sub_config
    self.recurse(k,name='configure')
  File "/Local/Build/Python/pycairo-1.8.10/.waf3-1.5.18-a7b91e2a913ce55fa6ecdf310df95752/wafadmin/Utils.py", line 461, in recurse
    f(self)
  File "/Local/Build/Python/pycairo-1.8.10/wscript", line 35, in configure
    ctx.check_python_headers()
  File "/Local/Build/Python/pycairo-1.8.10/.waf3-1.5.18-a7b91e2a913ce55fa6ecdf310df95752/wafadmin/Tools/python.py", line 122, in check_python_headers
    conf.check_tool('osx')
  File "/Local/Build/Python/pycairo-1.8.10/.waf3-1.5.18-a7b91e2a913ce55fa6ecdf310df95752/wafadmin/Configure.py", line 141, in check_tool
    Logs.error('Could not load the tool %r or download a suitable replacement from the repository (sys.path %r)\n%s'%(tool,sys.path,e))
UnboundLocalError: local variable 'e' referenced before assignment