diff -r 3625d006e81b -r cf846d47bb7e setup.py
--- a/setup.py	Tue Mar 31 14:17:46 2015 -0700
+++ b/setup.py	Mon Apr 06 11:21:20 2015 -0700
@@ -1,6 +1,7 @@
 # Copied from histedit setup.py
 # Credit to Augie Fackler <durin42@gmail.com>
 
+import os
 from distutils.core import setup
 from os.path import dirname, join
 
@@ -14,6 +15,13 @@
           if "'" in line:
             return line.split("'")[1]
 
+py_modules = [
+    'hgext.evolve',
+]
+
+if os.environ.get('INCLUDE_INHIBIT'):
+    py_modules.append('hgext.inhibit')
+
 setup(
     name='hg-evolve',
     version=get_version('hgext/evolve.py'),
@@ -25,5 +33,5 @@
     long_description=open('README').read(),
     keywords='hg mercurial',
     license='GPLv2+',
-    py_modules=['hgext.evolve'],
+    py_modules=py_modules
 )