Quick1 and Declarative install conflict for folderlistmodel plugin

QtQuick1 and QtDeclarative are installing the labs folderlistmodel plugin to the same place and only the last one installed works. The first (overwritten) one gives plugin load errors. When using a qt5 hash from early March[1] the installed plugin works for both.

Error message:
file:///tmp/foo/main.qml:2:1: plugin cannot be loaded for module "Qt.labs.folderlistmodel": Unknown error
import Qt.labs.folderlistmodel 1.0

[1] 5efc1e72fe916bbab53ed07c472dc82546856cde