If anything, I think irregular sleeping patterns are an aid, not a hindrance, to getting lucid. At least, it's always worked that way for me. One thing that can predispose you to getting lucid is being asleep during a period of time that your mind expects to be awake. And in my own case, my most intense lucid dreams have usually come during the most intense periods of the school year, when I am falling asleep exhausted earlier in the evening only to wake up halfway through the night for an extra hour or two of mentally intensive work, then falling asleep again for a couple hours before getting up for the day.

In fact, recently I took a year away from school and my ability to get lucid vanished almost entirely. I suspect this because my sleep pattern got more regular and I wasn't getting as much mental stimulation during the daylight hours. So if you are in college and you aren't getting lucid as much as you like, try studying harder!