when: ansible_os_family == 'RedHat'
   become: true
 
-- name: Install list of gem packages
-  gem: name={{ item }} state=latest
-  with_items:
-    - rake
-    - package_cloud
-  become: true
-
 - name: Install PlantUML
   block:
     - name: Create /opt/plantuml install directory
 
 ---
-pkg_build_essential: build-essential
 pkg_gnu_parallel: parallel
 pkg_netcat: netcat
 pkg_perl_digest_sha: libdigest-sha-perl
 pkg_perl_extutils_makemaker: libextutils-makemaker-cpanfile-perl
 pkg_perl_xml_xpath: libxml-xpath-perl
-pkg_ruby_dev: ruby-dev
 pkg_xz: xz-utils
 
 ---
-pkg_development_tools: "@Development tools"
 pkg_gnu_parallel: http://ftp.riken.jp/Linux/cern/centos/7/cern/x86_64/Packages/parallel-20150522-1.el7.cern.noarch.rpm
 pkg_netcat: nc
 pkg_perl_digest_sha: perl-Digest-SHA
 pkg_perl_extutils_makemaker: perl-ExtUtils-MakeMaker
 pkg_perl_xml_xpath: perl-XML-XPath
-pkg_ruby_devel: ruby-devel
 pkg_xz: xz
 
 ---
 lf_recommended_tools_packages_distro:
-  - build-essential
+  - parallel
+  - netcat
   - libdigest-sha-perl
   - libextutils-makemaker-cpanfile-perl
   - libxml-xpath-perl
-  - netcat
-  - parallel
-  - ruby-dev
   - xz-utils
 
 ---
 lf_recommended_tools_packages_distro:
-  - "@Development tools"
-  - http://ftp.riken.jp/Linux/cern/centos/7/cern/x86_64/Packages/parallel-20150522-1.el7.cern.noarch.rpm
   - fedora-packager
+  - http://ftp.riken.jp/Linux/cern/centos/7/cern/x86_64/Packages/parallel-20150522-1.el7.cern.noarch.rpm
   - nc
   - perl-Digest-SHA
   - perl-ExtUtils-MakeMaker
   - perl-XML-XPath
-  - ruby-devel
   - xz