未评估Ceedling的YAML文件中的环境变量

Question

我有一个Ceedling项目，我想为其设置未硬编码的ceedling路径。 为此，我尝试了两种方式-

:environment:
  - :CEEDLING: 
     - my_ceed/ceedling

和

:environment:
  - :CEEDLING: 
     - "#{ENV['CEEDLING_PATH']}"

并像

一样使用它

:which_ceedling: ../../../#{ENV['CEEDLING']}

但是，此评估不符合预期-

Traceback (most recent call last):
    3: from /usr/local/bin/ceedling:23:in `<main>'
    2: from /usr/local/bin/ceedling:23:in `load'
    1: from /var/lib/gems/2.5.0/gems/ceedling-0.29.1/bin/ceedling:316:in `<top (required)>'
/var/lib/gems/2.5.0/gems/ceedling-0.29.1/bin/ceedling:316:in `load': cannot load such file -- #{ENV['CEEDLING']}/lib/ceedling.rb (LoadError)

我在这里想念的是什么吗？或者，是否无法对路径本身进行取消？