diff -ruN Twisted-2.5.0/setup.py Twisted-2.5.0.new/setup.py
--- Twisted-2.5.0/setup.py	2007-01-08 16:30:05.000000000 -0600
+++ Twisted-2.5.0.new/setup.py	2007-05-10 13:42:28.361934000 -0500
@@ -16,9 +16,19 @@
 """
 
 import sys, os, glob
+#    sumoSubprojects = ['core', 'conch', 'lore', 'mail', 'names',
+#                   'runner', 'web', 'words', 'news']
+
+sp = os.getenv("TWISTED_SUBPROJECTS", None)
+if sp == None:
+    sumoSubprojects = ['core']
+else:
+    sumoSubprojects = sp.split()
+
+## make sure core is in sumoSubprojects
+if 'core' not in sumoSubprojects:
+    sumoSubprojects.insert(0, 'core')
 
-sumoSubprojects = ['core', 'conch', 'lore', 'mail', 'names',
-                   'runner', 'web', 'words', 'news']
 
 specialPaths = {'core': 'twisted/topfiles/setup.py'}