--- system.mk.orig	2007-04-22 22:43:48.000000000 +0200
+++ system.mk	2007-04-22 22:44:54.000000000 +0200
@@ -7,7 +7,7 @@
 ## Installation paths
 ##
 
-PREFIX=/usr/local
+PREFIX=/usr
 
 # Unless you are creating a package conforming to some OS's standards, you
 # probably do not want to modify the following directories:
@@ -19,7 +19,7 @@
 # Some .lua files and ion-* shell scripts
 SHAREDIR=$(PREFIX)/share/ion3
 # Manual pages
-MANDIR=$(PREFIX)/share/man
+MANDIR=$(PREFIX)/man
 # Some documents
 DOCDIR=$(PREFIX)/share/doc/ion3
 # Nothing at the moment
@@ -56,7 +56,7 @@
 
 # If you have installed Lua 5.1 from the official tarball without changing
 # paths, this should do it.
-LUA_DIR=/usr/local
+LUA_DIR=/usr
 LUA_LIBS = -L$(LUA_DIR)/lib -llua
 LUA_INCLUDES = -I$(LUA_DIR)/include
 LUA=$(LUA_DIR)/bin/lua