lookAlong not working as expected

[Martmists-GH]

When using Quaternionf().identity().lookAlong(target.position - camera.position, Vector3f(0, 1, 0)), the code doesn't seem to properly look at the object. Instead, it seems to roll the camera. In the attached image, the cube should become centered. (Cube is centered on 0,0,0, camera is at 1,1,1, target.position - camera.position correctly returns -1,-1,-1)