diff --git a/rubygem-concurrent-ruby.spec b/rubygem-concurrent-ruby.spec
new file mode 100644
index 0000000..a6bbe3c
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+++ b/rubygem-concurrent-ruby.spec
@@ -0,0 +1,97 @@
+# Generated from concurrent-ruby-1.0.0.gem by gem2rpm -*- rpm-spec -*-
+%global gem_name concurrent-ruby
+
+Name: rubygem-%{gem_name}
+Version: 1.0.0
+Release: 1%{?dist}
+Summary: Modern concurrency tools for Ruby
+Group: Development/Languages
+License: MIT
+URL: http://www.concurrent-ruby.com
+Source0: https://rubygems.org/gems/%{gem_name}-%{version}.gem
+# git git clone https://github.com/ruby-concurrency/concurrent-ruby.git && cd concurrent-ruby
+# git checkout v1.0.0 && tar czvf concurrent-ruby-1.0.0-specs.tar.gz spec/
+Source1: %{gem_name}-%{version}-specs.tar.gz
+BuildRequires: ruby(release)
+BuildRequires: rubygems-devel
+BuildRequires: ruby >= 1.9.3
+BuildRequires: rubygem(rspec)
+BuildRequires: rubygem(timecop)
+BuildArch: noarch
+
+%description
+Modern concurrency tools including agents, futures, promises, thread pools,
+actors, supervisors, and more.
+
+Inspired by Erlang, Clojure, Go, JavaScript, actors, and classic concurrency
+patterns.
+
+
+%package doc
+Summary: Documentation for %{name}
+Group: Documentation
+Requires: %{name} = %{version}-%{release}
+BuildArch: noarch
+
+%description doc
+Documentation for %{name}.
+
+%prep
+gem unpack %{SOURCE0}
+
+%setup -q -D -T -n  %{gem_name}-%{version}
+
+gem spec %{SOURCE0} -l --ruby > %{gem_name}.gemspec
+
+%build
+# Create the gem as gem install only works on a gem file
+gem build %{gem_name}.gemspec
+
+# %%gem_install compiles any C extensions and installs the gem into ./%%gem_dir
+# by default, so that we can move it into the buildroot in %%install
+%gem_install
+
+%install
+mkdir -p %{buildroot}%{gem_dir}
+cp -a .%{gem_dir}/* \
+        %{buildroot}%{gem_dir}/
+
+
+# Run the test suite
+%check
+pushd .%{gem_instdir}
+tar xzf %{SOURCE1}
+
+# -edge is not part of this gem.
+sed -i '/require.*concurrent-edge/ s/^/#/' spec/spec_helper.rb
+
+# We don't have the C extension. This is very likely bug in the test
+# implemntation.
+sed -i '/allow_c_extensions?/,/^      end/ s/^/#/' spec/concurrent/atomic/atomic_reference_spec.rb
+
+# This is empty file, which fails with recent RSpec, but excluding it,
+# no harm is done.
+mv spec/concurrent/lazy_register_spec.rb{,.disble}
+
+# Exclude the -edge test cases.
+rspec -rspec_helper \
+  --exclude-pattern 'spec/concurrent/{actor_spec.rb,channel_spec.rb,lazy_register_spec.rb,channel/**/*,atomic/atomic_markable_reference_spec.rb,edge/**/*}'\
+  spec
+
+popd
+
+%files
+%dir %{gem_instdir}
+%license %{gem_instdir}/LICENSE.txt
+%{gem_libdir}
+%exclude %{gem_cache}
+%{gem_spec}
+
+%files doc
+%doc %{gem_docdir}
+%doc %{gem_instdir}/CHANGELOG.md
+%doc %{gem_instdir}/README.md
+
+%changelog
+* Wed Dec 23 2015 Vít Ondruch <vondruch@redhat.com> - 1.0.0-1
+- Initial package