# We start in /home/vboxuser/
# All dependecies for debian are installen, EXCEPT luajit
# sudo apt install g++ make libc6-dev cmake libpng-dev libjpeg-dev libxi-dev libgl1-mesa-dev libsqlite3-dev libogg-dev libvorbis-dev libopenal-dev libcurl4-gnutls-dev libfreetype6-dev zlib1g-dev libgmp-dev libjsoncpp-dev libzstd-dev libluajit-5.1-dev

mkdir 5.7.0
cd 5.7.0

git clone -b v2.1 --depth 1 https://github.com/LuaJIT/LuaJIT.git
cd LuaJIT
make -j$(nproc)
cd ..

git clone https://github.com/minetest/irrlicht.git
cd irrlicht
cmake . -DBUILD_SHARED_LIBS=OFF -B build
make -C build -j$(nproc)
cd ..

git clone -b stable-5 --depth 1 https://github.com/minetest/minetest.git
cd minetest
git clone -b stable-5 --depth 1  https://github.com/minetest/minetest_game.git games/minetest_game
cmake -S . -B build -DIRRLICHTMT_BUILD_DIR="/home/vboxuser/5.7.0/irrlicht/build/" -DLUA_INCLUDE_DIR="/home/vboxuser/5.7.0/LuaJIT/src" -DENABLE_LUAJIT=ON -DLUA_LIBRARY="/home/vboxuser/5.7.0/LuaJIT/src/libluajit.so"
make -C build -j$(nproc)

# To check, we do

ldd bin/minetest | grep luajit

# Result:
# libluajit-5.1.so.2 => not found

######################

If I hand over the .a insted of the .so in -DLUA_LIBRARY="/home/vboxuser/5.7.0/LuaJIT/src/libluajit.so", I get the text

CMake Warning at src/CMakeLists.txt:705 (message):
  You are using a relatively old version of LuaJIT.  We recommend running a
  recent version (from git) as older ones are known not to build/work
  correctly in all cases.

  THIS APPLIES ESPECIALLY ON macOS OR Linux/aarch64!