Just build houses near the ice caps to produce water and grow food. Easy!
We may be able to survive and live on Mars in regions protected by thin ceilings of silica aerogel, a strong lightweight material that insulates heat and blocks harmful ultraviolet radiation while weighing almost nothing.…
http://go.theregister.com/feed/www.theregister.co.uk/2019/07/16/aerogel_mars_shelters/