Mystery Plant - vinca, periwinkle

Hello.
I've moved half way across the continent recently, and so I don't know what many plants are around my new house.
This little blue flowered plant is growing vine-like in a somewhat sheltered area of the neglected yard - it is tucked in beside a shed, where it likely gets more shade and water off the roof then the rest of the lawn. A neighbour also has it growing on there side of the fence, near a bush of some kind, and it seems reasonable to assume that this has spread onto my yard from his. Also to note - this area was used as a garbage pile by a previous owner, with rusting furniture springs and crumbling roofing tiles making up a large portion of the "soil" until I pulled a lot of that junk out.
Yard is located at about 1100 ft in the semi-arid Okanagon.
Thank-you for your help.

Vinca minor also called Periwinkle. It's a lovely no maintenance and drought tolerant ground cover that can handle a lot of different less than ideal conditions.

That is periwinkle, sometimes called vinca. Looks like we posted almost simultaneously Jessica. Great minds and all that...

Thank-you both!

It looks to me like it actually might be vinca major, which is bigger and not as purple.