My goose started nest building behaviour about a month before she started laying. She practiced everywhere and with everything - on the floor with pens, socks, and dust bunnies; on my bed with pillows; on the lawn with grass and hay; in her pond(!) with sticks and leaves. Whenever she wasn't busy doing regular goose stuff, she'd practice nest building. Also, she'd explore anything remotely cavelike making cute nest-building sounds - she really liked small spaces with a low ceiling and a good view. Like underneath a table or a chair.
She finally settled for the goose house, where we'd put in a lot of straw. Now, whenever she needs to lay, she'll go there - and only there. She usually sleeps with me in my house, so she'll even wake me up in the middle of the night, honking incessantly until I put my clothes on and take her to the goose house.
If you want her to choose a different location for her nest, I'll recommend destroying the nest she already has built. Put out a lot of straw or hay in the place you choose - and remember, she may lay anytime during day or night, so it has to be a place she has access to at all times. Preferably in a place where she already feels safe - and really is safe from predators.