1st try of scons hg default on python3

When I try my build on /usr/bin/python3 (fedora linux python3.4) it fails: 

/usr/bin/python3 ~/scons-new/bootstrap.py
/usr/bin/python3 /home/nbecker/scons-new/bootstrap/src/script/scons.py
scons: Reading SConscript files ...
PYTHONINC: /usr/include/python3.4m
3
EXT: .cpython-34m.so
AttributeError: 'module' object has no attribute 'generate':
  File "/home/nbecker/interference/SConstruct", line 85:
    env = Environment (ENV = {'PATH' : os.environ['PATH']}, 
CXXFLAGS=cxxflags, SHCXXFLAGS=shcxxflags, LIBPATH=[NDARRAYLIBPATH, 
BOOSTLIBPATH, IPPLIBPATH, MKLPATH, ACMLLIBPATH], CPPPATH=[LOCALBOOST, 
NDARRAYINC, BOOSTINC, PYTHONINC, NUMPYINC, EIGENINC, IPPINC, MKLINC, 
ACMLINCLUDE],  RPATH=[NDARRAYLIBPATH, BOOSTLIBPATH, IPPLIBPATH, MKLPATH, 
ACMLLIBPATH])
  File "/home/nbecker/scons-new/bootstrap/src/engine/SCons/Environment.py", 
line 982:
    apply_tools(self, tools, toolpath)
  File "/home/nbecker/scons-new/bootstrap/src/engine/SCons/Environment.py", 
line 107:
    env.Tool(tool)
  File "/home/nbecker/scons-new/bootstrap/src/engine/SCons/Environment.py", 
line 1789:
    tool(self)
  File "/home/nbecker/scons-
new/bootstrap/src/engine/SCons/Tool/__init__.py", line 225:
    self.generate(env, *args, **kw)
  File "/home/nbecker/scons-new/bootstrap/src/engine/SCons/Tool/default.py", 
line 40:
    for t in SCons.Tool.tool_list(env['PLATFORM'], env):
  File "/home/nbecker/scons-
new/bootstrap/src/engine/SCons/Tool/__init__.py", line 1162:
    ], env)
  File "/home/nbecker/scons-
new/bootstrap/src/engine/SCons/Tool/__init__.py", line 1029:
    return list(filter (ToolExists, tools))
  File "/home/nbecker/scons-
new/bootstrap/src/engine/SCons/Tool/__init__.py", line 1028:
    return Tool(tool).exists(env)
  File "/home/nbecker/scons-
new/bootstrap/src/engine/SCons/Tool/__init__.py", line 108:
    self.generate = module.generate


When run using python3.5 from my anaconda install it seems to succeed:

(py35)[nbecker@nbecker2 interference]$ python3 ~/scons-new/bootstrap.py
/home/nbecker/anaconda3/envs/py35/bin/python3 /home/nbecker/scons-
new/bootstrap/src/script/scons.py
scons: Reading SConscript files ...
PYTHONINC: /home/nbecker/anaconda3/envs/py35/include/python3.5m
3
EXT: .cpython-35m-x86_64-linux-gnu.so
Checking for C header file unuran.h... (cached) yes
found unuran.h
HAVE_UNURAN= 1
Checking for C header file mkl_vsl.h... (cached) yes
found mkl_vsl.h
HAVE_MKL= 1
scons: done reading SConscript files.
scons: Building targets ...
scons: `_lms.cpython-35m-x86_64-linux-gnu.os' is up to date.
...