diff --git a/ruby-qt.spec b/ruby-qt.spec
index 08bb555..580bd87 100644
--- a/ruby-qt.spec
+++ b/ruby-qt.spec
@@ -1,15 +1,15 @@
-%global ruby_sitelib %(ruby -rrbconfig -e 'puts Config::CONFIG["sitelibdir"]')
-%global ruby_sitearch %(ruby -rrbconfig -e 'puts Config::CONFIG["sitearchdir"]')
 %if 0%{?fedora} > 16
 %global ruby_abi 1.9.1
 %else
 %global ruby_abi 1.8
+%global ruby_vendorlibdir %(ruby -rrbconfig -e 'puts Config::CONFIG["sitelibdir"]')
+%global ruby_vendorarchdir %(ruby -rrbconfig -e 'puts Config::CONFIG["sitearchdir"]')
 %endif
 
 Summary: Ruby bindings for Qt 4
 Name:    ruby-qt
 Version: 4.8.0
-Release: 2%{?dist}
+Release: 3%{?dist}
 
 License: LGPLv2+
 Group:   Development/Languages
@@ -73,9 +73,12 @@ Requires: %{name}%{?_isa} = %{?epoch:%{epoch}:}%{version}-%{release}
  
 
 %build
+# just a cosmetic change for cmake defs
+sed -i -e 's|SITEARCH|VENDORARCH|' -e 's|SITELIB|VENDORLIB|' CMakeLists.txt
+
 mkdir -p %{_target_platform}
 pushd %{_target_platform}
-%{cmake_kde4} ..
+%{cmake_kde4} -DRUBY_VENDORARCH_DIR=%{ruby_vendorarchdir} -DRUBY_VENDORLIB_DIR=%{ruby_vendorlibdir} ..
 popd
 
 make %{?_smp_mflags} -C %{_target_platform}
@@ -97,17 +100,17 @@ rm -rf %{buildroot}
 %defattr(-, root, root, 0755)
 %doc AUTHORS COPYING COPYING.LIB ChangeLog INSTALL README
 %{_libdir}/libqtruby4shared.so.2*
-%{ruby_sitearch}/*.so
-%{ruby_sitelib}/phonon/
-%{ruby_sitelib}/qscintilla/
-%{ruby_sitelib}/qtdeclarative/
-%{ruby_sitelib}/qwt/
-%{ruby_sitelib}/Qt/
-%{ruby_sitelib}/Qt*.rb
-%{ruby_sitelib}/qtscript/
-%{ruby_sitelib}/qttest/
-%{ruby_sitelib}/qtuitools/
-%{ruby_sitelib}/qtwebkit/
+%{ruby_vendorarchdir}/*.so
+%{ruby_vendorlibdir}/phonon/
+%{ruby_vendorlibdir}/qscintilla/
+%{ruby_vendorlibdir}/qtdeclarative/
+%{ruby_vendorlibdir}/qwt/
+%{ruby_vendorlibdir}/Qt/
+%{ruby_vendorlibdir}/Qt*.rb
+%{ruby_vendorlibdir}/qtscript/
+%{ruby_vendorlibdir}/qttest/
+%{ruby_vendorlibdir}/qtuitools/
+%{ruby_vendorlibdir}/qtwebkit/
 
 %files devel
 %defattr(-, root, root, 0755)
@@ -124,7 +127,10 @@ rm -rf %{buildroot}
 %doc examples
 
 
-%changelog 
+%changelog
+* Wed Feb 08 2012 Jaroslav Reznik <jreznik@redhat.com> 4.8.0-3
+- proper rebuild for ruby-1.9.x (use ruby macros for dirs)
+
 * Tue Feb 07 2012 Rex Dieter <rdieter@fedoraproject.org> 4.8.0-2
 - rebuild for ruby-1.9.x (f17)