I have no clue why.
Building native extensions. This could take a while...
ERROR: Error installing compass:
ERROR: Failed to build gem native extension.
current directory: /var/lib/gems/2.3.0/gems/ffi-1.9.14/ext/ffi_c
/usr/bin/ruby2.3 -r ./siteconf20170101-25402-1d8hvvf.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/2.3.0/gems/ffi-1.9.14 for inspection.
Results logged to /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/ffi-1.9.14/gem_make.out
I have no clue why.
Building native extensions. This could take a while... ERROR: Error installing compass: ERROR: Failed to build gem native extension. current directory: /var/lib/gems/2.3.0/gems/ffi-1.9.14/ext/ffi_c /usr/bin/ruby2.3 -r ./siteconf20170101-25402-1d8hvvf.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/2.3.0/gems/ffi-1.9.14 for inspection. Results logged to /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/ffi-1.9.14/gem_make.out