Help with Shop on a hill, water seeping in

Hello!
I'm finishing a pole shed with concrete floor, insulation, etc. It's on a slight hill down a few hundred feet from the house. One side of the shop is facing up a hill, and of course the other is facing down the hill.
Right now just the concrete floor is done, but the rest is getting started this weekend.
Yesterday doing some work we noticed water leaking in from the side facing up the hill... onto the concrete. Living in MN now I know this spring after the snow melts it will probably be more of a problem with water leaking in from the side.
Without doing full out drain tile, are there any suggestions on how to help eliminate water leaking in from the "high side" of the shop into the building? Damming? Trenching? Maybe a small tile about 2 feet in the ground around that side of the building?
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grade at least a few feet away from new builiding allowng a place for water to go.
basically a gentle trench going downhill
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A shallow ditch or swale on the high side to divert the water around the building to the low side.

grade at least a few feet away from new builiding allowng a place for water to go.
basically a gentle trench going downhill
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EXT wrote:

a simple concept, and yet SO often overlooked by dozer operators, landscapers, and homeowners. (Like on this place, where they put the addition where I'm pretty sure the water used to drain through, and didn't make alternate arrangements. Still working on a way to fix that, that doesn't require regrading and reseeding entire yard.)
In the case of a outbuilding cut into an existing hill, to avoid reshaping the entire hill, you sometimes need to put a retaining wall 20 feet back or so, and slope the yard toward that. Doesn't have to be a major production, often a couple of feet high is plenty. If ponding out by the wall starts happening, you can always put in a drainage ditch/swale, or even a drywell or tile to daylight, at your leisure.
aem sends...
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