-ENV = { 'PATH' : os.environ['PATH'] }
-for key in ['LD_LIBRARY_PATH', 'GUILE_LOAD_PATH', 'PKG_CONFIG_PATH', 'TEXMF']:
+ENV = { 'PYTHONPATH': '' }
+for key in ['GUILE_LOAD_PATH', 'LD_LIBRARY_PATH', 'PATH', 'PKG_CONFIG_PATH',
+ 'PYTHONPATH', 'TEXMF']: