Okay so I'm trying to install the gem bootstrap-sass in my ruby on rails app but getting this error.
I followed the basic steps by pasting $ gem 'bootstrap-sass' and $ gem 'autoprefixer-rails' into the gemfile and runnig bndle install in the terminal. My laptop is running on ubuntu 18.04 if that might be causing issue.
Installing autoprefixer-rails 9.6.1
Using debug_inspector 0.0.2
Using binding_of_caller 0.7.2
Fetching ffi 1.11.1
Installing ffi 1.11.1 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory:
/tmp/bundler20190706-4690-hktydzffi-1.11.1/gems/ffi-1.11.1/ext/ffi_c
/usr/bin/ruby2.5 -r ./siteconf20190706-4690-tr7q8y.rb extconf.rb
mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h
extconf failed, exit code 1
Gem files will remain installed in
/tmp/bundler20190706-4690-hktydzffi-1.11.1/gems/ffi-1.11.1 for inspection.
Results logged to
/tmp/bundler20190706-4690-hktydzffi-1.11.1/extensions/x86_64-linux/2.5.0/ffi-1.11.1/gem_make.out
An error occurred while installing ffi (1.11.1), and Bundler cannot
continue.
Make sure that `gem install ffi -v '1.11.1'` succeeds before bundling.
In Gemfile:
bootstrap-sass was resolved to 3.4.1, which depends on
sassc was resolved to 2.0.1, which depends on
ffi
gem 'bootstrap-sass', '3.3.7'
repelce
gem 'bootstrap-sass'.
because bootstrap-sass was 3.4.1 too higher.