diff --git a/rubygem-cheetah.spec b/rubygem-cheetah.spec
index d8c05f6..7dcb46e 100644
--- a/rubygem-cheetah.spec
+++ b/rubygem-cheetah.spec
@@ -1,37 +1,11 @@
-#
-# spec file for package rubygem-cheetah
-#
-# Copyright (c) 2021 SUSE LINUX GmbH, Nuernberg, Germany.
-#
-# All modifications and additions to the file contributed by third parties
-# remain the property of their copyright owners, unless otherwise agreed
-# upon. The license for this file, and modifications and additions to the
-# file, is the same license as for the pristine package itself (unless the
-# license for the pristine package is not an Open Source License, in which
-# case the license is the MIT License). An "Open Source License" is a
-# license that conforms to the Open Source Definition (Version 1.9)
-# published by the Open Source Initiative.
-
-# Please submit bugfixes or comments via http://bugs.opensuse.org/
-#
-
-
-#
-# This file was generated with a gem2rpm.yml and not just plain gem2rpm.
-# All sections marked as MANUAL, license headers, summaries and descriptions
-# can be maintained in that file. Please consult this file before editing any
-# of those fields
-#
+%global gem_name cheetah
 
 Name:           rubygem-cheetah
 Version:        1.0.0
 Release:        0
 %define mod_name cheetah
 %define mod_full_name %{mod_name}-%{version}
-BuildRoot:      %{_tmppath}/%{name}-%{version}-build
-BuildRequires:  ruby-macros >= 5
-BuildRequires:  ruby >= 2.5
-BuildRequires:  rubygem-gem2rpm
+BuildRequires:  ruby(release) rubygems-devel rubygem(rspec) >= 3 rubygem(did_you_mean)
 Url:            https://github.com/openSUSE/cheetah
 Source:         https://rubygems.org/gems/%{mod_full_name}.gem
 Source1:        gem2rpm.yml
@@ -44,14 +18,21 @@ Your swiss army knife for executing external commands in Ruby safely and
 conveniently.
 
 %prep
-
+%autosetup -n %{mod_full_name} -p1
+gem unpack %{SOURCE0}
 %build
-
+gem build ../%{mod_full_name}.gemspec
 %install
-%gem_install \
-  --doc-files="CHANGELOG LICENSE README.md" \
-  -f
-
-%gem_packages
+%gem_install 
+mkdir -p %{buildroot}%{gem_dir}
+cp -a .%{gem_dir}/* \
+        %{buildroot}%{gem_dir}/
 
+%files
+%dir %{gem_instdir}
+%{gem_libdir}
+%{_datadir}/gems/doc/%{mod_full_name}/
+%{_datadir}/gems/gems/%{mod_full_name}/
+%exclude %{gem_cache}
+%{gem_spec}
 %changelog