Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

[mimikq]

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

current directory: /home/mimik/spina/vendor/bundle/ruby/2.7.0/gems/racc-1.5.2/ext/racc/cparse

/usr/bin/ruby2.7 -I /usr/lib/ruby/2.7.0 -r ./siteconf20210316-19712-13uk1fy.rb extconf.rb
mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h

You might have to install separate package for the ruby development
environment, ruby-dev or ruby-devel for example.

extconf failed, exit code 1

Gem files will remain installed in /home/mimik/spina/vendor/bundle/ruby/2.7.0/gems/racc-1.5.2 for inspection.
Results logged to /home/mimik/spina/vendor/bundle/ruby/2.7.0/extensions/x86_64-linux/2.7.0/racc-1.5.2/gem_make.out

An error occurred while installing racc (1.5.2), and Bundler cannot continue.
Make sure that gem install racc -v '1.5.2' --source 'https://rubygems.org/' succeeds before bundling.

In Gemfile:
rails was resolved to 5.2.4.5, which depends on
actioncable was resolved to 5.2.4.5, which depends on
actionpack was resolved to 5.2.4.5, which depends on
actionview was resolved to 5.2.4.5, which depends on
rails-dom-testing was resolved to 2.0.3, which depends on
nokogiri was resolved to 1.11.2, which depends on
racc
mimik@mimik:/spina$ gem install racc
ERROR: While executing gem ... (Gem::FilePermissionError)
You don't have write permissions for the /var/lib/gems/2.7.0 directory.
mimik@mimik:/spina$ sudo gem install racc
[sudo] password for mimik:
Building native extensions. This could take a while...
ERROR: Error installing racc:
ERROR: Failed to build gem native extension.

current directory: /var/lib/gems/2.7.0/gems/racc-1.5.2/ext/racc/cparse

/usr/bin/ruby2.7 -I /usr/lib/ruby/2.7.0 -r ./siteconf20210316-19809-7ptndh.rb extconf.rb
mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h

You might have to install separate package for the ruby development
environment, ruby-dev or ruby-devel for example.

extconf failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.7.0/gems/racc-1.5.2 for inspection.
Results logged to /var/lib/gems/2.7.0/extensions/x86_64-linux/2.7.0/racc-1.5.2/gem_make.out

me new in gem ruby and rails and i dont know how to move on to install spina CMS.

[mimikq]

ok it looks like i fix it with : sudo apt-get install ruby-dev