If genpluginprojects is called from fullbuild we set the Python source directory to be the same as fullbuild uses (in stead of using the default sys.prefix). This fixes an issue Mark Day raised that you can't use fullbuild with one Python installation to build another one.
diff --git a/Mac/scripts/fullbuild.py b/Mac/scripts/fullbuild.py
index d3a5a13..43d69e6 100644
--- a/Mac/scripts/fullbuild.py
+++ b/Mac/scripts/fullbuild.py
@@ -18,6 +18,7 @@
 import EasyDialogs
 import re
 import string
+import genpluginprojects
 
 import aetools
 import AppleEvents
@@ -377,6 +378,8 @@
 	if not ok:
 		sys.exit(0)
 	dir = dir.as_pathname()
+	# Set genpluginprojects to use this folder (slight hack)
+	genpluginprojects.PYTHONDIR = dir
 	
 	todo = handle_dialog(os.path.join(dir, MACBUILDNO))