Got exception invoking 'as'. Exception follows.
Traceback (most recent call last):
  File "/tmp/allmydata-tahoe-1.9.2/misc/build_helpers/show-tool-versions.py", line 73, in print_as_ver
    stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
  File "/usr/lib/python2.7/subprocess.py", line 679, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1249, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory
platform: Linux-3.2.0-4-amd64-x86_64-with-debian-wheezy-sid
machine:  x86_64
linux_distribution: ('debian', 'wheezy/sid', '')

python: 2.7.3rc2 (default, Apr 22 2012, 22:30:17)  [GCC 4.6.3]
maxunicode: 1114111

locale: LANG=en_US.UTF-8 LANGUAGE= LC_CTYPE="en_US.UTF-8" LC_NUMERIC="en_US.UTF-8" LC_TIME="en_US.UTF-8" LC_COLLATE="en_US.UTF-8" LC_MONETARY="en_US.UTF-8" LC_MESSAGES="en_US.UTF-8" LC_PAPER="en_US.UTF-8" LC_NAME="en_US.UTF-8" LC_ADDRESS="en_US.UTF-8" LC_TELEPHONE="en_US.UTF-8" LC_MEASUREMENT="en_US.UTF-8" LC_IDENTIFICATION="en_US.UTF-8" LC_ALL= 
filesystem.encoding: UTF-8
locale.getpreferredencoding: UTF-8
locale.defaultlocale: ('en_US', 'UTF-8')
locale.locale: (None, None)

buildbot: no such file or directory
buildslave: no such file or directory
gcc: no such file or directory
g++: no such file or directory
cryptest: no such file or directory
git: no such file or directory
openssl: OpenSSL 1.0.1c 10 May 2012 
darcs: no such file or directory
darcs-exact-version: no such file or directory
flappclient: Foolscap version: 0.6.4 Twisted version: 12.0.0 
valgrind: no such file or directory
lzip: no such file or directory
setuptools: [distribute 0.6.24dev-r0 (/usr/lib/python2.7/dist-packages)]

coverage: DistributionNotFound

trialcoverage: DistributionNotFound

pyflakes: DistributionNotFound

zope.interface: [zope.interface 3.6.1 (/usr/lib/python2.7/dist-packages)]
zope.interface module: <module 'zope.interface' from '/usr/lib/python2.7/dist-packages/zope/interface/__init__.pyc'>

setuptools_darcs: DistributionNotFound

darcsver: DistributionNotFound

Twisted: [Twisted 12.0.0 (/usr/lib/python2.7/dist-packages)]
Twisted module: <module 'twisted' from '/usr/lib/python2.7/dist-packages/twisted/__init__.pyc'>
Twisted __version__: 12.0.0

TwistedCore: DistributionNotFound
TwistedCore module: <module 'twisted.python' from '/usr/lib/python2.7/dist-packages/twisted/python/__init__.pyc'>

TwistedWeb: DistributionNotFound
TwistedWeb module: <_ModuleProxy module=<module 'twisted.web' from '/usr/lib/python2.7/dist-packages/twisted/web/__init__.pyc'>>
TwistedWeb __version__: 12.0.0

TwistedConch: DistributionNotFound
TwistedConch module: <module 'twisted.conch' from '/usr/lib/python2.7/dist-packages/twisted/conch/__init__.pyc'>
TwistedConch __version__: 12.0.0

pycryptopp: [pycryptopp 0.5.29 (/usr/lib/python2.7/dist-packages)]
pycryptopp module: <module 'pycryptopp' from '/usr/lib/python2.7/dist-packages/pycryptopp/__init__.pyc'>
pycryptopp __version__: 0.5.29