Error while building V8 on Mac Lion

I am following these instructions to attempt to build V8 on Mac Lion: http://code.google.com/apis/v8/build.html

I get this error:

    $ scons sample=shell mode=release snapshot=on
scons: Reading SConscript files ...
OSError: [Errno 2] No such file or directory:
  File "/Users/pottmi/Tools/v8/v8-read-only/SConstruct", line 1569:
    Build()
  File "/Users/pottmi/Tools/v8/v8-read-only/SConstruct", line 1517:
    opts = GetOptions()
  File "/Users/pottmi/Tools/v8/v8-read-only/SConstruct", line 1153:
    AddOptions(SIMPLE_OPTIONS, result)
  File "/Users/pottmi/Tools/v8/v8-read-only/SConstruct", line 1137:
    default = guess(guess_env)
  File "/Users/pottmi/Tools/v8/v8-read-only/SConstruct", line 959:
    stdout=subprocess.PIPE).communicate()[0]
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 672:
    None
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1202:
    None

Here are the versions of the software that I have installed:

svn, version 1.6.17 (r1128011)
Python 2.7.1
SCons by Steven Knight et al.:
        script: v2.1.0.r5357[MODIFIED], 2011/09/09 21:31:03, by bdeegan on ubuntu
        engine: v2.1.0.r5357[MODIFIED], 2011/09/09 21:31:03, by bdeegan on ubuntu
        engine path: ['/usr/local/lib/scons-2.1.0/SCons']

The /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ path exists, but there is no subprocess.py file.

Solution

I believe the recommended way to build v8 is with gyp. Please see http://code.google.com/p/v8/wiki/BuildingWithGYP for information on building it that way.