How to run Protractor test when spec is remote

Here's the situation:

• machineA has Protractor, Selenium, WebDriver, etc. installed.
• machineB has all source code including tests and server running source code, but no Protractor, Selenium, etc
• environment is Linux on both machines

How can I run the Protractor command on machineA so that it points to the spec on machineB?

ie. How to get a local Protractor command to point to a remote spec?