compile error when building iceweasel

[Worthem, Dennis]

Hello 

I was wondering if anyone could help me with the following problem or
suggest where I should go. 

I am trying to compile iceweasel (38.5.0esr-1~deb7u2) for Debian Wheezy
on my Debian Wheezy desktop ( I want to compile this because we are
trying to make small changes to iceweasel for a distro that is a
derivative of Debian Wheezy, which is gNewSense). 

The steps that I follow to compile are: 

dget
http://security.debian.org/debian-security/pool/updates/main/i/iceweasel/iceweasel_38.5.0esr-1~deb7u2.dsc

apt-get build-dep iceweasel
cd iceweasel-*
debuild -uc -us 

When I build I get the following:

        checking Python environment is Mozilla virtualenv... Traceback
        (most recent call last):
          File "<string>", line 1, in <module>
          File
       
"/home/dennis/temp/iceweaselLatest/ucclia/iceweasel-38.5.0esr/python/mozbuild/mozbuild/base.py",
line 17, in <module>
            from mach.mixin.process import ProcessExecutionMixin
          File
       
"/home/dennis/temp/iceweaselLatest/ucclia/iceweasel-38.5.0esr/python/mach/mach/mixin/process.py",
line 29, in <module>
            raise Exception('Could not detect environment shell!')
        Exception: Could not detect environment shell!
        configure: error: Python environment does not appear to be sane.
        ------ config.log ------
        This file contains any messages produced by compilers while
        running configure, to aid debugging if configure makes a
        mistake.

which seems to indicate a problem with Python, but I ran the following
section of code from process.py, line 29 using Python:

        # Perform detection of operating system environment. This is
        used by command
        # execution. We only do this once to save redundancy. Yes, this
        can fail module
        # loading. That is arguably OK.
        if 'SHELL' in os.environ:
            _current_shell = os.environ['SHELL']
        elif 'MOZILLABUILD' in os.environ:
            _current_shell = os.environ['MOZILLABUILD'] +
        '/msys/bin/sh.exe'
        elif 'COMSPEC' in os.environ:
            _current_shell = os.environ['COMSPEC']
        else:
            raise Exception('Could not detect environment shell!')

but the value of _current_shell is "/bin/bash" same as the SHELL
environment variable.

Do you have an idea what I am doing wrong? 

Thank you. 

Dennis Worthem 
  
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