When you try to install Python 2.5 built egg on Python 2.4 on Windows, the install starts fine, but is aborted due to "dependency issue" ("error: Could not find suitable distribution for Requirement.parse") in the package you are trying to install. The error message makes the user think there is something wrong in the package files. However, it would be very friendly to report that the package you are trying to install is not compatible with Python version. A sample case below. Trying to install Python 2.5 egg when running Python 2.4. C:\Documents and Settings\cx\Desktop>"c:\Program Files\Plone 3\Python\Pyth on.exe" "c:\Program Files\Plone 3\Python\Scripts\easy_install-script.py" ./aura. theme-1.0.0-py2.5.egg Processing aura.theme-1.0.0-py2.5.egg creating c:\program files\plone 3\python\lib\site-packages\aura.theme-1.0.0-py2. 5.egg Extracting aura.theme-1.0.0-py2.5.egg to c:\program files\plone 3\python\lib\sit e-packages File "c:\program files\plone 3\python\lib\site-packages\aura.theme-1.0.0-py2.5 .egg\aura\theme\skins\aura_theme_custom_templates\createContent.py", line 232 return run(context) SyntaxError: 'return' outside function File "c:\program files\plone 3\python\lib\site-packages\aura.theme-1.0.0-py2.5 .egg\aura\theme\skins\aura_theme_custom_templates\getSection.py", line 14 return iter.Title() SyntaxError: 'return' outside function File "c:\program files\plone 3\python\lib\site-packages\aura.theme-1.0.0-py2.5 .egg\aura\theme\skins\aura_theme_styles\plone.css.py", line 26 return printed SyntaxError: 'return' outside function Adding aura.theme 1.0.0 to easy-install.pth file Installed c:\program files\plone 3\python\lib\site-packages\aura.theme-1.0.0-py2 .5.egg Processing dependencies for aura.theme==1.0.0 Searching for aura.theme==1.0.0 Reading http://pypi.python.org/simple/aura.theme/ Couldn't find index page for 'aura.theme' (maybe misspelled?) Scanning index of all packages (this may take a while) Reading http://pypi.python.org/simple/ No local packages or download links found for aura.theme==1.0.0 error: Could not find suitable distribution for Requirement.parse('aura.theme==1 .0.0')