diff --git a/rubygem-delorean.spec b/rubygem-delorean.spec
index 8587c50..38d4946 100644
--- a/rubygem-delorean.spec
+++ b/rubygem-delorean.spec
@@ -1,16 +1,14 @@
-%global gemname delorean
+%global gem_name delorean
 
-%global gemdir %(ruby -rubygems -e 'puts Gem::dir' 2>/dev/null)
-%global geminstdir %{gemdir}/gems/%{gemname}-%{version}
 
 Summary: Delorean lets you travel in time with Ruby by mocking Time.now
-Name: rubygem-%{gemname}
+Name: rubygem-%{gem_name}
 Version: 1.2.0
-Release: 3%{?dist}
+Release: 4%{?dist}
 Group: Development/Languages
 License: MIT
 URL: https://github.com/bebanjo/delorean
-Source0: http://rubygems.org/gems/%{gemname}-%{version}.gem
+Source0: http://rubygems.org/gems/%{gem_name}-%{version}.gem
 # to get specs:
 # git clone https://github.com/bebanjo/delorean.git && cd delorean
 # git checkout v1.2.0
@@ -19,13 +17,13 @@ Source1:  %{name}-spec.tgz
 Requires: ruby(abi) = 1.8
 Requires: ruby(rubygems)
 Requires: rubygem(chronic)
-BuildRequires: ruby(rubygems)
+BuildRequires: rubygems-devel
 # for specs:
 BuildRequires: rubygem(rspec-core)
 BuildRequires: rubygem(activesupport)
 BuildRequires: rubygem(chronic)
 BuildArch: noarch
-Provides: rubygem(%{gemname}) = %{version}
+Provides: rubygem(%{gem_name}) = %{version}
 
 %description
 Delorean lets you travel in time with Ruby by mocking Time.now.
@@ -40,10 +38,10 @@ Documentation for %{name}
 
 %prep
 %setup -q -c -T
-mkdir -p .%{gemdir}
-gem install --local --install-dir .%{gemdir} \
+mkdir -p .%{gem_dir}
+gem install --local --install-dir .%{gem_dir} \
             --force --rdoc %{SOURCE0}
-pushd .%{geminstdir}
+pushd .%{gem_instdir}
 tar xzf %{SOURCE1}
 popd
 
@@ -51,27 +49,30 @@ popd
 
 %install
 rm -rf %{buildroot}
-mkdir -p %{buildroot}%{gemdir}
-cp -a .%{gemdir}/* %{buildroot}%{gemdir}/
+mkdir -p %{buildroot}%{gem_dir}
+cp -a .%{gem_dir}/* %{buildroot}%{gem_dir}/
 
 %check
-pushd .%{geminstdir}
+pushd .%{gem_instdir}
 rspec spec
 popd
 
 %files
-%dir %{geminstdir}
-%exclude %{gemdir}/cache/%{gemname}-%{version}.gem
-%{geminstdir}/lib
-%{gemdir}/specifications/%{gemname}-%{version}.gemspec
-%doc %{geminstdir}/MIT-LICENSE
+%dir %{gem_instdir}
+%exclude %{gem_cache}
+%{gem_libdir}
+%{gem_spec}
+%doc %{gem_instdir}/MIT-LICENSE
 
 %files doc
-%doc %{gemdir}/doc/%{gemname}-%{version}
-%doc %{geminstdir}/README.md
-%{geminstdir}/spec
+%doc %{gem_docdir}
+%doc %{gem_instdir}/README.md
+%{gem_instdir}/spec
 
 %changelog
+* Wed Feb 01 2012 Bohuslav Kabrda <bkabrda@redhat.com> - 1.2.0-4
+- Rebuilt for Ruby 1.9.3.
+
 * Sat Jan 14 2012 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.2.0-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_17_Mass_Rebuild