PhpStorm SCSS文件观察者：“未找到sass”

Question

我不明白：我配置了一个scss文件观察器，但每次编译开始时，PhpStorm都会抛出这个错误：

/Users/peter_goebel/.rvm/gems/ruby-1.9.3-p194/bin/scss --no-cache --update style.scss:style.css
/Library/Ruby/Site/1.8/rubygems/dependency.rb:247:in `to_specs': Could not find sass (>= 0) amongst [long list of gems...] (Gem::LoadError)
    from /Library/Ruby/Site/1.8/rubygems/dependency.rb:256:in `to_spec'
    from /Library/Ruby/Site/1.8/rubygems.rb:1231:in `gem'
    from /Users/peter_goebel/.rvm/gems/ruby-1.9.3-p194/bin/scss:18
    from /Users/peter_goebel/.rvm/gems/ruby-1.9.3-p194/bin/ruby_noexec_wrapper:14

我做错了什么？

一些可能有帮助的屏幕截图：

Answer 1

好的，我明白了。

我必须设置此环境变量：

GEM_PATH : /Users/peter_goebel/.rvm/gems/ruby-1.9.3-p194