title: Typescript TS5042 Build: Option 'project' cannot be mixed with source files on a command line
body: <p>I am receiving the following error across all typescript projects that I am trying run.</p>
  
  <pre><code>TS5042  Build: Option 'project' cannot be mixed with source files on a command line.
  </code></pre>
  
  <p>I have downloaded a free Typescript Angular2 template, ran it and this error immediately pops up.</p>
  
  <p>Has it got something to do with my global typescript installation?</p>