old_contents: import subprocess
  import os
  
  PYVER = "2.5"
  
  # Bootstrap
  subprocess.check_call(['python', 'prepare_bootstrap.py'])
  
  # Build binaries
  subprocess.check_call(['python', 'build.py', '-p', PYVER], cwd = 'bootstrap-%s' % PYVER)
  
  # Build installer using nsis
  subprocess.check_call(['makensis', 'numpy-superinstaller.nsi'], cwd = 'bootstrap-%s' % PYVER)
  
new_contents: import subprocess
  import os
  
  PYVER = "2.5"
  
  # Bootstrap
  subprocess.check_call(['python', 'prepare_bootstrap.py', '-p', PYVER])
  
  # Build binaries
  subprocess.check_call(['python', 'build.py', '-p', PYVER], cwd = 'bootstrap-%s' % PYVER)
  
  # Build installer using nsis
  subprocess.check_call(['makensis', 'numpy-superinstaller.nsi'], cwd = 'bootstrap-%s' % PYVER)
  
subject: Handle python version in prepare_bootstrap script.