Index: src/Makefile
===================================================================
--- src/Makefile.orig	2010-02-24 20:05:41.000000000 +0100
+++ src/Makefile	2012-06-13 10:56:04.477254689 +0200
@@ -9,8 +9,8 @@ PYLIB ?= /usr/lib/$(PYLIBVER)
 PYTHONLIBDIR ?= $(LIBDIR)/$(PYLIBVER)
 RUBYLIBVER ?= $(shell ruby -e 'print RUBY_VERSION.split(".")[0..1].join(".")')
 RUBYPLATFORM ?= $(shell ruby -e 'print RUBY_PLATFORM')
-RUBYINC ?= $(LIBDIR)/ruby/$(RUBYLIBVER)/$(RUBYPLATFORM)
-RUBYINSTALL ?= $(LIBDIR)/ruby/site_ruby/$(RUBYLIBVER)/$(RUBYPLATFORM)
+RUBYINC ?= $(shell ruby -r rbconfig -e "print Config::CONFIG['rubyhdrdir'].nil? ? '$(LIBDIR)/ruby/$(RUBYLIBVER)' : Config::CONFIG['rubyhdrdir']")
+RUBYINSTALL ?= $(shell ruby -r rbconfig -e "print Config::CONFIG['vendorarchdir'].nil? ? '$(DESTDIR)'+Config::CONFIG['sitearchdir'] : '$(DESTDIR)'+Config::CONFIG['vendorarchdir']")
 
 VERSION = $(shell cat ../VERSION)
 LIBVERSION = 1
@@ -72,7 +72,7 @@ $(SWIGLOBJ): $(SWIGCOUT)
 	$(CC) $(filter-out -Werror,$(CFLAGS)) -I$(PYINC) -fPIC -DSHARED -c -o $@ $<
 
 $(SWIGRUBYLOBJ): $(SWIGRUBYCOUT)
-	$(CC) $(filter-out -Werror,$(CFLAGS)) -I$(RUBYINC) -fPIC -DSHARED -c -o $@ $<
+	$(CC) $(filter-out -Werror,$(CFLAGS)) -I$(RUBYINC) -I$(RUBYINC)/$(RUBYPLATFORM) -fPIC -DSHARED -c -o $@ $<
 
 $(SWIGSO): $(SWIGLOBJ)
 	$(CC) $(CFLAGS) $(LDFLAGS) -shared -o $@ $< -L. -lselinux -L$(LIBDIR) -Wl,-soname,$@