There are several Oberwils in Switzerland and with location 'Basel' you live near the wrong one.
Have a look at the little map and you'll see where the skilift is. It's out Spiez / Zweisimmen way, in canton Berne.
Well I don't care much really one way or the other but last time I was in Oberwil BL it wasn't at 900m and there wasn't much near there at 1550m. Skiing in Oberwil
Basel-Land could do with some ski resorts though (and some snow and 2000m+ mountains). Maybe this is why airlines keep advertising Basel as "the gateway to the Alps"