A few months ago, I ran into psych/yaml problems doing just the above because I didn't have the right yaml libraries installed.
Also, if you did that and also did something like "apt-get install chef" or something that installs the system ruby, you will have two copies of ruby installed and need to make sure your $path is correct.
Also, if you did that and also did something like "apt-get install chef" or something that installs the system ruby, you will have two copies of ruby installed and need to make sure your $path is correct.