diff -uNr libselinux-2.2.2.orig/src/Makefile libselinux-2.2.2/src/Makefile
--- libselinux-2.2.2.orig/src/Makefile	2013-11-06 20:56:30.000000000 +0100
+++ libselinux-2.2.2/src/Makefile	2013-11-25 21:02:05.327561766 +0100
@@ -16,7 +16,7 @@
 PYLIBDIR ?= $(LIBDIR)/$(PYLIBVER)
 RUBYLIBVER ?= $(shell $(RUBY) -e 'print RUBY_VERSION.split(".")[0..1].join(".")')
 RUBYPLATFORM ?= $(shell $(RUBY) -e 'print RUBY_PLATFORM')
-RUBYINC ?= $(shell pkg-config --cflags ruby)
+RUBYINC ?= $(shell pkg-config --cflags ruby-$(RUBYLIBVER))
 RUBYINSTALL ?= $(LIBDIR)/ruby/site_ruby/$(RUBYLIBVER)/$(RUBYPLATFORM)
 LIBBASE ?= $(shell basename $(LIBDIR))