Specifying dependencies with gulp-jasmine

I have the following gulpfile.js:

var gulp = require('gulp'),
    jasmine = require('gulp-jasmine');

gulp.task('default', function () {
    return gulp
        .src('spec/test.js')
        .pipe(jasmine());
});

The code inside spec/test.js uses a global angular variable, however, and throws an error about it being undefined when I run gulp task default. Let's say angular is defined in file spec/lib.js, in global scope.

How do I tell jasmine() what dependencies it needs to load first into the global scope before running the describe()s inside test.js? In other words, how do I tell jasmine() to load spec/lib.js first, before it runs the tests?