--- ./lgi/Makefile.orig	2013-03-04 22:10:19.000000000 +0100
+++ ./lgi/Makefile	2013-03-26 23:07:31.000000000 +0100
@@ -5,10 +5,13 @@
 # License: MIT
 #
 
-PREFIX = /usr/local
+PREFIX ?= /usr/local
 LUA_VERSION=5.1
-LUA_LIBDIR = $(PREFIX)/lib/lua/$(LUA_VERSION)
-LUA_SHAREDIR = $(PREFIX)/share/lua/$(LUA_VERSION)
+LUA_LIBDIR ?= $(PREFIX)/lib/lua/$(LUA_VERSION)
+LUA_SHAREDIR ?= $(PREFIX)/share/lua/$(LUA_VERSION)
+LUA_CFLAGS ?= -I$(LUA_INCDIR) $(CPPFLAGS)
+LUA_LIBDIR ?= $(LUA_MODLIBDIR)
+LUA_SHAREDIR ?= $(LUA_MODSHAREDIR)
 
 GINAME = gobject-introspection-1.0
 PKGS = $(GINAME) gmodule-2.0 libffi
@@ -74,11 +77,11 @@
 CORESOURCES = $(wildcard *.lua)
 
 install : $(CORE) $(VERSION_FILE)
-	mkdir -p $(DESTDIR)$(LUA_LIBDIR)/lgi
-	cp $(CORE) $(DESTDIR)$(LUA_LIBDIR)/lgi
-	mkdir -p $(DESTDIR)$(LUA_SHAREDIR)
-	cp ../lgi.lua $(DESTDIR)$(LUA_SHAREDIR)
-	mkdir -p $(DESTDIR)$(LUA_SHAREDIR)/lgi
-	cp $(CORESOURCES) $(VERSION_FILE) $(DESTDIR)$(LUA_SHAREDIR)/lgi
-	mkdir -p $(DESTDIR)$(LUA_SHAREDIR)/lgi/override
-	cp $(OVERRIDES) $(DESTDIR)$(LUA_SHAREDIR)/lgi/override
+	mkdir -p $(DESTDIR)$(LUA_MODLIBDIR)/lgi
+	cp $(CORE) $(DESTDIR)$(LUA_MODLIBDIR)/lgi
+	mkdir -p $(DESTDIR)$(LUA_MODSHAREDIR)
+	cp ../lgi.lua $(DESTDIR)$(LUA_MODSHAREDIR)
+	mkdir -p $(DESTDIR)$(LUA_MODSHAREDIR)/lgi
+	cp $(CORESOURCES) $(VERSION_FILE) $(DESTDIR)$(LUA_MODSHAREDIR)/lgi
+	mkdir -p $(DESTDIR)$(LUA_MODSHAREDIR)/lgi/override
+	cp $(OVERRIDES) $(DESTDIR)$(LUA_MODSHAREDIR)/lgi/override