--- setup.py	2017-03-02 11:35:41.688884000 -0800
+++ setup.py	2017-03-02 11:36:07.745885086 -0800
@@ -103,7 +103,7 @@
 if not prefix and "PREFIX" in os.environ:
     prefix = os.environ["PREFIX"]
 if not prefix or not len (prefix):
-    prefix = "/usr/local"
+    prefix = "/usr"
 
 if sys.argv[1] in ("install", "uninstall") and len (prefix):
     sys.argv += ["--prefix", prefix]