Is the toilet, which is affixed to the bathroom floor with screws and nuts, purified by the dryness of the impurity, given that it is attached to the ground?

The jurists differed regarding the purity of land that has become impure (najis) through dryness. The majority opinion is that it does not become pure by that means. Some jurists, however, held that land and anything permanently attached to it becomes pure through dryness and the disappearance of the traces of impurity. However, what is mentioned in the question is not considered to be permanently attached to the land, so dryness is not sufficient to rule it pure.