If I install solarus from source code don't copy libsolarus.so and libsolarus.so.1 libraries

If I compile and install solarus in Ubuntu 18.04 LTS 64 bits with these commands

sudo apt install build-essential cmake pkg-config libsdl2-dev libsdl2-image-dev libsdl2-ttf-dev libluajit-5.1-dev libphysfs-dev libopenal-dev libvorbis-dev libmodplug-dev qtbase5-dev qttools5-dev qttools5-dev-tools libglm-dev
git clone https://gitlab.com/solarus-games/solarus
cd solarus/
cmake
mkdir build
cd build/
cmake ..
make
sudo make install

I can't start the game because it can't find two libraries, I solved it copy them to /lib

sudo cp libsolarus.so /lib
sudo cp libsolarus.so.1 /lib