Comment 2 for bug 738213

Reproduce: try to install python from sources (after doing `apt-get build-dep python 2.7` of course).
You'll see warnings about missing modules:

Python build finished, but the necessary bits to build these modules were not found:
_bsddb _sqlite3 bsddb185
dbm dl gdbm
imageop sunaudiodev zlib
To find the necessary bits, look in setup.py in detect_modules() for the module's name.

Failed to build these modules:
crypt nis

Please importance critical, as you'll lose half of your archive on next rebuild.
BTW, there's build failure with setuptools:

Traceback (most recent call last):
  File "setup.py", line 94, in <module>
    scripts = scripts,
  File "/tmp/ibd3-1/lib/python2.7/distutils/core.py", line 152, in setup
    dist.run_commands()
  File "/tmp/ibd3-1/lib/python2.7/distutils/dist.py", line 953, in run_commands
    self.run_command(cmd)
  File "/tmp/ibd3-1/lib/python2.7/distutils/dist.py", line 972, in run_command
    cmd_obj.run()
  File "/tmp/ibd3-setup-bJCwNZ/setuptools-0.6c11/setuptools/command/install.py", line 76, in run
    self.do_egg_install()
  File "/tmp/ibd3-setup-bJCwNZ/setuptools-0.6c11/setuptools/command/install.py", line 96, in do_egg_install
    self.run_command('bdist_egg')
  File "/tmp/ibd3-1/lib/python2.7/distutils/cmd.py", line 326, in run_command
    self.distribution.run_command(command)
  File "/tmp/ibd3-1/lib/python2.7/distutils/dist.py", line 972, in run_command
    cmd_obj.run()
  File "/tmp/ibd3-setup-bJCwNZ/setuptools-0.6c11/setuptools/command/bdist_egg.py", line 236, in run
    dry_run=self.dry_run, mode=self.gen_header())
  File "/tmp/ibd3-setup-bJCwNZ/setuptools-0.6c11/setuptools/command/bdist_egg.py", line 527, in make_zipfile
    z = zipfile.ZipFile(zip_filename, mode, compression=compression)
  File "/tmp/ibd3-1/lib/python2.7/zipfile.py", line 679, in __init__
    "Compression requires the (missing) zlib module"
RuntimeError: Compression requires the (missing) zlib module