title: when i use my emacs with purcell's .emacs.d ,i can't use slime
body: <p>when i try M-x slime ,all i get is </p>
  
  <p>Can't locate module: SWANK-IO-PACKAGE::SWANK-TRACE-DIALOG</p>
  
  <p>but when i use my own .emacs.d ,it works.</p>
  
  <p>how can i fix it?</p>