Problems building Tahoe-LAFS v1.10.0 for OpenBSD 5.4.

[nvw6lxh2ytnyw at pyramidheadgroup.ca]

Hello,

I have the following problem:
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$ python2.7 setup.py build
Not found: tahoe-deps
Not found: ../tahoe-deps
unable to execute cc: No such file or directory
unable to execute cc: No such file or directory
unable to execute cc: No such file or directory
Traceback (most recent call last):
   File "setup.py", line 452, in <module>
     **setup_args
   File "/usr/local/lib/python2.7/distutils/core.py", line 112, in setup
     _setup_distribution = dist = klass(attrs)
   File 
"/var/usr/grishin/bin/tahoe-lafs/allmydata-tahoe-1.10.0/setuptools-0.6c16dev4.egg/setuptools/dist.py", line 260, in __init__
     self.fetch_build_eggs(attrs.pop('setup_requires'))
   File 
"/var/usr/grishin/bin/tahoe-lafs/allmydata-tahoe-1.10.0/setuptools-0.6c16dev4.egg/setuptools/dist.py", line 284, in fetch_build_eggs
     parse_requirements(requires), installer=self.fetch_build_egg
   File 
"/var/usr/grishin/bin/tahoe-lafs/allmydata-tahoe-1.10.0/setuptools-0.6c16dev4.egg/pkg_resources.py", line 576, in resolve
     dist = best[req.key] = env.best_match(req, self, installer)
   File 
"/var/usr/grishin/bin/tahoe-lafs/allmydata-tahoe-1.10.0/setuptools-0.6c16dev4.egg/pkg_resources.py", line 826, in best_match
     return self.obtain(req, installer) # try and download/install
   File 
"/var/usr/grishin/bin/tahoe-lafs/allmydata-tahoe-1.10.0/setuptools-0.6c16dev4.egg/pkg_resources.py", line 838, in obtain
     return installer(requirement)
   File 
"/var/usr/grishin/bin/tahoe-lafs/allmydata-tahoe-1.10.0/setuptools-0.6c16dev4.egg/setuptools/dist.py", line 327, in fetch_build_egg
     return cmd.easy_install(req)
   File 
"/var/usr/grishin/bin/tahoe-lafs/allmydata-tahoe-1.10.0/setuptools-0.6c16dev4.egg/setuptools/command/easy_install.py", line 453, in easy_install
     return self.install_item(spec, dist.location, tmpdir, deps)
   File 
"/var/usr/grishin/bin/tahoe-lafs/allmydata-tahoe-1.10.0/setuptools-0.6c16dev4.egg/setuptools/command/easy_install.py", line 483, in install_item
     dists = self.install_eggs(spec, download, tmpdir)
   File 
"/var/usr/grishin/bin/tahoe-lafs/allmydata-tahoe-1.10.0/setuptools-0.6c16dev4.egg/setuptools/command/easy_install.py", line 663, in install_eggs
     return self.build_and_install(setup_script, setup_base)
   File 
"/var/usr/grishin/bin/tahoe-lafs/allmydata-tahoe-1.10.0/setuptools-0.6c16dev4.egg/setuptools/command/easy_install.py", line 938, in build_and_install
     self.run_setup(setup_script, setup_base, args)
   File 
"/var/usr/grishin/bin/tahoe-lafs/allmydata-tahoe-1.10.0/setuptools-0.6c16dev4.egg/setuptools/command/easy_install.py", line 929, in run_setup
     raise DistutilsError("Setup script exited with %s" % (v.args[0],))
distutils.errors.DistutilsError: Setup script exited with error: command 
'cc' failed with exit status 1
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(running this command as root does not help).

My system:
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$ uname -a
OpenBSD backup-master1.local 5.4 GENERIC.MP#44 i386
$ python2.7 -V
Python 2.7.5
------------------------------------

Any ideas?

Thanks,
Yuriy