What was the Buddha reffering to as "house-builder"?

[breckjensen]

"Through the round of many births I roamed without reward, without rest, seeking the house-builder. Painful is birth again & again. House-builder, you're seen! You will not build a house again. All your rafters broken, the ridge pole destroyed, gone to the Unformed, the mind has come to the end of craving." Was he reffering to the craving or mental fermentations?



I didn't find the right solution from the internet.



References:

dhammawheel.com/viewtopic.php?f=24&t=46039465



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