Wordless Sass not compiling

screen

/************************
WordlessCompileException: [0]: Failed to run the following command: '/Users/onnimonni/.rvm/bin/wordless_compass' 'compile' '--trace' '/Users/onnimonni/Projects/wordpress/wp-content/themes/wordless/tmp' '--config' '/Users/onnimonni/Projects/wordpress/wp-content/themes/wordless/tmp/compass_configgeAWoH'
Generated config:
http_path = "./"
http_images_dir = "../images"
images_dir = "../assets/images"
http_fonts_dir = "../fonts"
fonts_dir = "../assets/fonts"
css_path = "/Users/onnimonni/Projects/wordpress/wp-content/themes/wordless/tmp"
relative_assets = false
output_style = :compressed
environment = :production
sass_path = "/Users/onnimonni/Projects/wordpress/wp-content/themes/wordless/theme/assets/stylesheets"

Output error:

/Users/onnimonni/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- sass/script/node (LoadError)
	from /Users/onnimonni/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /Users/onnimonni/.rvm/gems/ruby-2.0.0-p353@wordless/gems/compass-0.12.2/lib/compass/sass_extensions/monkey_patches/browser_support.rb:1:in `<top (required)>'
	from /Users/onnimonni/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /Users/onnimonni/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /Users/onnimonni/.rvm/gems/ruby-2.0.0-p353@wordless/gems/compass-0.12.2/lib/compass/sass_extensions/monkey_patches.rb:2:in `block in <top (required)>'
	from /Users/onnimonni/.rvm/gems/ruby-2.0.0-p353@wordless/gems/compass-0.12.2/lib/compass/sass_extensions/monkey_patches.rb:1:in `each'
	from /Users/onnimonni/.rvm/gems/ruby-2.0.0-p353@wordless/gems/compass-0.12.2/lib/compass/sass_extensions/monkey_patches.rb:1:in `<top (required)>'
	from /Users/onnimonni/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /Users/onnimonni/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /Users/onnimonni/.rvm/gems/ruby-2.0.0-p353@wordless/gems/compass-0.12.2/lib/compass/sass_extensions.rb:9:in `<top (required)>'
	from /Users/onnimonni/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /Users/onnimonni/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /Users/onnimonni/.rvm/gems/ruby-2.0.0-p353@wordless/gems/compass-0.12.2/lib/compass.rb:5:in `block in <top (required)>'
	from /Users/onnimonni/.rvm/gems/ruby-2.0.0-p353@wordless/gems/compass-0.12.2/lib/compass.rb:4:in `each'
	from /Users/onnimonni/.rvm/gems/ruby-2.0.0-p353@wordless/gems/compass-0.12.2/lib/compass.rb:4:in `<top (required)>'
	from /Users/onnimonni/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /Users/onnimonni/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /Users/onnimonni/.rvm/gems/ruby-2.0.0-p353@wordless/gems/compass-0.12.2/bin/compass:20:in `block in <top (required)>'
	from /Users/onnimonni/.rvm/gems/ruby-2.0.0-p353@wordless/gems/compass-0.12.2/bin/compass:8:in `fallback_load_path'
	from /Users/onnimonni/.rvm/gems/ruby-2.0.0-p353@wordless/gems/compass-0.12.2/bin/compass:19:in `<top (required)>'
	from /Users/onnimonni/.rvm/gems/ruby-2.0.0-p353@wordless/bin/compass:23:in `load'
	from /Users/onnimonni/.rvm/gems/ruby-2.0.0-p353@wordless/bin/compass:23:in `<main>'
	from /Users/onnimonni/.rvm/gems/ruby-2.0.0-p353@wordless/bin/ruby_executable_hooks:15:in `eval'
	from /Users/onnimonni/.rvm/gems/ruby-2.0.0-p353@wordless/bin/ruby_executable_hooks:15:in `<main>'
************************/

body::before { content: "Damn, we're having problems compiling the Sass. Check the CSS source code for more infos!"; font-family: monospace; white-space: pre; display: block; background: #eee; padding: 20px; }