Не могу поставить compass-normalize

sudo gem install compass-normalize

Building native extensions. This could take a while...
ERROR:  Error installing compass-normalize:
ERROR: Failed to build gem native extension.

current directory: /var/lib/gems/2.4.0/gems/ffi-1.9.21/ext/ffi_c
/usr/bin/ruby2.4 -r ./siteconf20180207-11167-19012x8.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 /var/lib/gems/2.4.0/gems/ffi-1.9.21 for inspection.
Results logged to /var/lib/gems/2.4.0/extensions/x86_64-linux/2.4.0/ffi-1.9.21/gem_make.out