Javascript not rendering in jade

I am unable to call my script.js file from inside jade though javascript renders perfectly fine if inserted inline. This is my first attempt, so the js file is simply an alert:

alert("javascript works");

I'm inclined to believe that I am improperly calling the script. Currently layout.jade looks like:

doctype 5
html
  head
    title= "LeafPress - Hot off the Presses"
    link(rel='stylesheet', href='/stylesheets/style.css')
  block scripts
    script(type='text/javascript', src='/javascripts/script.js')
  body
    block content

I've tried a number of permutations of the script path (../public/javascripts/script.js; /public/javascripts/script.js; public/javascripts/script.js; javascripts/script.js; script.js), as well as trying placing the script directly in the root and 'views' dir.

app.js:

/**
 * Module dependencies.
 */

var express = require('express')
  , routes = require('./routes/index')
  , user = require('./routes/user')
  , http = require('http')
  , path = require('path');

var app = express();

app.configure(function(){
  app.set('port', process.env.PORT || 3000);
  app.set('views', __dirname + '/views');
  app.set('view engine', 'jade');
  app.use(express.favicon());
  app.use(express.logger('dev'));
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(express.cookieParser('your secret here'));
  app.use(express.session());
  app.use(app.router);
  app.use(require('stylus').middleware(__dirname + '/public'));
  app.use(express.static(path.join(__dirname, 'public')));
});

app.configure('development', function(){
  app.use(express.errorHandler());
});

app.get('/', routes.index);
app.get('/permalink', routes.permalink);
app.get('/users', user.list);

http.createServer(app).listen(app.get('port'), function(){
  console.log("Express server listening on port " + app.get('port'));
});

index.js:

/*
 * GET home page.
 */

exports.index = function(req, res){
  res.render('index', { title: 'Express' });
};

exports.permalink = function(req, res) {
  res.render('permalink', { title: 'Comments page' });
};

My relevant file hierarchy looks like:

- public
  - javascripts
    - script.js
- views
  - index.jade
  - layout.jade
- routes
  - index.js

app.js

This seemed relevant, but didn't fix the problem: static javascript not rendering in jade (with express/node.js)