diff --git a/ruby.spec b/ruby.spec
index bcc0f76..a018f61 100644
--- a/ruby.spec
+++ b/ruby.spec
@@ -196,6 +196,11 @@ Source15: test_openssl_fips.rb
 %{load:%{SOURCE4}}
 %{load:%{SOURCE5}}
 
+%global __local_generator_requires make -C %{_builddir}/%{buildsubdir}/%{_vpath_builddir} -s runruby TESTRUN_SCRIPT="--enable-gems %{SOURCE9}"
+%global __local_generator_provides make -C %{_builddir}/%{buildsubdir}/%{_vpath_builddir} -s runruby TESTRUN_SCRIPT="--enable-gems %{SOURCE10}"
+%global __local_generator_conflicts make -C %{_builddir}/%{buildsubdir}/%{_vpath_builddir} -s runruby TESTRUN_SCRIPT="--enable-gems %{SOURCE11}"
+%global __local_generator_path ^%{gem_dir}/specifications/.*\.gemspec$
+
 # Fix ruby_version abuse.
 # https://bugs.ruby-lang.org/issues/11002
 Patch0: ruby-2.3.0-ruby_version.patch
@@ -229,6 +234,7 @@ Requires: %{name}-libs%{?_isa} = %{version}-%{release}
 Recommends: ruby(rubygems) >= %{rubygems_version}
 Recommends: rubygem(bigdecimal) >= %{bigdecimal_version}
 
+BuildRequires: rpm-local-generator-support
 # Build dependencies
 BuildRequires: autoconf
 BuildRequires: gcc