usr/lib64/ruby/2.4.0/x86_64-linux/enc/utf_32le.so
   usr/lib64/ruby/2.4.0/x86_64-linux/enc/windows_1250.so
   usr/lib64/ruby/2.4.0/x86_64-linux/enc/iso_8859_10.so
   usr/lib64/ruby/2.4.0/x86_64-linux/enc/gb18030.so
   usr/lib64/ruby/2.4.0/x86_64-linux/enc/windows_1254.so
   usr/lib64/ruby/2.4.0/x86_64-linux/enc/gbk.so
   usr/lib64/ruby/2.4.0/x86_64-linux/enc/windows_1251.so
ecompressdir: bzip2 -9 /usr/share/man
ecompressdir: bzip2 -9 /usr/share/doc

>>> Installing (1 of 14) dev-lang/ruby-2.4.2::ruby-kit
!!! Error: Can't load module ruby
exiting
!!! Error: Can't load module ruby
exiting
 * 
 * To switch between available Ruby profiles, execute as root:
 * 	eselect ruby set ruby(19|20|...)
 * 

>>> Emerging (2 of 14) dev-ruby/rubygems-2.6.14::ruby-kit
 * rubygems-2.6.14.tgz SHA256 SHA512 WHIRLPOOL size ;-) ...                                                                                                                                                 [ ok ]
>>> Unpacking source...
>>> Unpacking rubygems-2.6.14.tgz to /var/tmp/portage/dev-ruby/rubygems-2.6.14/work/all
>>> Source unpacked in /var/tmp/portage/dev-ruby/rubygems-2.6.14/work
>>> Preparing source in /var/tmp/portage/dev-ruby/rubygems-2.6.14/work ...
 * Running prepare phase for all ...
 * Running prepare phase for all ...
 * Adjusting to prefix /
 *   operating_system.rb ...                                                                                                                                                                                [ ok ]
 * Running source copy phase for ruby22 ...
 * Running source copy phase for ruby23 ...
 * Running source copy phase for ruby24 ...
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/dev-ruby/rubygems-2.6.14/work ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/dev-ruby/rubygems-2.6.14/work ...
 * Running compile phase for ruby22 ...
 * Running compile phase for ruby23 ...
 * Running compile phase for ruby24 ...
>>> Source compiled.
>>> Test phase [not enabled]: dev-ruby/rubygems-2.6.14

>>> Install rubygems-2.6.14 into /var/tmp/portage/dev-ruby/rubygems-2.6.14/image/ category dev-ruby
 * Running install phase for ruby22 ...
 * ERROR: dev-ruby/rubygems-2.6.14::ruby-kit failed (install phase):
 *   $RUBY is not set
 * 
 * Call stack:
 *     ebuild.sh, line  121:  Called src_install
 *   environment, line 4348:  Called ruby-ng_src_install
 *   environment, line 4157:  Called _ruby_each_implementation 'each_ruby_install'
 *   environment, line  390:  Called _ruby_invoke_environment 'ruby22' 'each_ruby_install'
 *   environment, line  511:  Called each_ruby_install
 *   environment, line  733:  Called doruby '-r' 'rubygems' 'rubygems.rb' 'ubygems.rb'
 *   environment, line  717:  Called die
 * The specific snippet of code:
 *       [[ -z ${RUBY} ]] && die "\$RUBY is not set";
 * 
 * If you need support, post the output of `emerge --info '=dev-ruby/rubygems-2.6.14::ruby-kit'`,
 * the complete build log and the output of `emerge -pqv '=dev-ruby/rubygems-2.6.14::ruby-kit'`.
!!! When you file a bug report, please include the following information:
GENTOO_VM=  CLASSPATH="" JAVA_HOME=""
JAVACFLAGS="" COMPILER=""
and of course, the output of emerge --info =rubygems-2.6.14
 * The complete build log is located at '/var/tmp/portage/dev-ruby/rubygems-2.6.14/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-ruby/rubygems-2.6.14/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-ruby/rubygems-2.6.14/work/ruby22/rubygems-2.6.14/lib'
 * S: '/var/tmp/portage/dev-ruby/rubygems-2.6.14/work/ruby22/rubygems-2.6.14'

>>> Failed to emerge dev-ruby/rubygems-2.6.14, Log file:

>>>  '/var/tmp/portage/dev-ruby/rubygems-2.6.14/temp/build.log'

 * Messages for package dev-lang/ruby-2.4.2:

 * 
 * To switch between available Ruby profiles, execute as root:
 * 	eselect ruby set ruby(19|20|...)
 * 

 * Messages for package dev-ruby/rubygems-2.6.14:

 * ERROR: dev-ruby/rubygems-2.6.14::ruby-kit failed (install phase):
 *   $RUBY is not set
 * 
 * Call stack:
 *     ebuild.sh, line  121:  Called src_install
 *   environment, line 4348:  Called ruby-ng_src_install
 *   environment, line 4157:  Called _ruby_each_implementation 'each_ruby_install'
 *   environment, line  390:  Called _ruby_invoke_environment 'ruby22' 'each_ruby_install'
 *   environment, line  511:  Called each_ruby_install
 *   environment, line  733:  Called doruby '-r' 'rubygems' 'rubygems.rb' 'ubygems.rb'
 *   environment, line  717:  Called die
 * The specific snippet of code:
 *       [[ -z ${RUBY} ]] && die "\$RUBY is not set";
 * 
 * If you need support, post the output of `emerge --info '=dev-ruby/rubygems-2.6.14::ruby-kit'`,
 * the complete build log and the output of `emerge -pqv '=dev-ruby/rubygems-2.6.14::ruby-kit'`.
 * The complete build log is located at '/var/tmp/portage/dev-ruby/rubygems-2.6.14/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-ruby/rubygems-2.6.14/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-ruby/rubygems-2.6.14/work/ruby22/rubygems-2.6.14/lib'
 * S: '/var/tmp/portage/dev-ruby/rubygems-2.6.14/work/ruby22/rubygems-2.6.14'

 * GNU info directory index is up-to-date.