Of course, the best solution for giving a dry closet will be, but if the means do not allow you, then a completely comfortable and convenient toilet can be built on your own.
You need to make a shovel the pit deeper. Then take a wooden plate according to the planned sizes of your toilet. From this plate we will make a frame. On a dug pit, which should be less than a wooden slab for the frame, lay a wooden plate (the size of the plate depends on the width and length of the toilet). The side walls of this plate will be attached to the walls of the toilet. Before attaching the frame, on it you need to cut a hole in the desired size with a jigsaw. You need to install the seat on this hole. For convenience, the seat can be fixed not on the frame itself, but on a specially made box.
The box is done like this: take four walls, select them so that the hole is inside the box, the bottom does not need to be made, but the top must be made with the same hole as in the frame. It is on this hole that you need to fix the seat. The box to the frame must be fixed with the help of nails so that it is reliable. Then we install the walls. The walls need to be dug into the ground so that the design is stable. Then we make a roof. Typically, toilets make such sizes: height – 210 cm, width – 100 cm, length – 150 cm. All this is individual, so select the dimensions at will. The toilet can be insulated by laying it out with polystyrene or mineral wool.