diff --git a/build.sh b/build.sh
new file mode 100644
index 0000000..89ab867
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,102 @@
+#!/bin/bash -e
+
+# Builds an AppImage using appimagetool.
+# You need to run this inside of a build directory in the source tree,
+# it will generate the build files and compile Minetest for you.
+
+# This script should be run on Debian 11 Bullseye.
+
+apt-get install -y git g++ make ninja-build libc6-dev cmake libpng-dev libjpeg-dev libxi-dev libgl1-mesa-dev libsqlite3-dev libogg-dev libvorbis-dev libopenal-dev libcurl4-openssl-dev libfreetype6-dev zlib1g-dev libgmp-dev libzstd-dev libleveldb-dev gettext desktop-file-utils ca-certificates wget file --no-install-recommends
+
+git clone --depth 1 https://github.com/LuaJIT/LuaJIT.git luajit
+git clone --depth 1 --branch stable-5 https://github.com/luanti-org/luanti.git
+
+# COMPILE LUAJIT
+pushd luajit
+make amalg -j4
+popd
+
+pushd luanti
+mkdir -p build; cd build
+
+# Download appimagetool
+if [ ! -f appimagetool ]; then
+	# Old version of appimagetool:
+	#wget https://github.com/AppImage/AppImageKit/releases/download/continuous/appimagetool-aarch64.AppImage -O appimagetool
+	wget https://github.com/AppImage/appimagetool/releases/download/continuous/appimagetool-aarch64.AppImage -O appimagetool
+	chmod +x appimagetool
+fi
+
+# Compile and install into AppDir
+cmake .. -G Ninja \
+	-DCMAKE_BUILD_TYPE=RelWithDebInfo \
+	-DCMAKE_INSTALL_PREFIX=AppDir/usr \
+	-DBUILD_UNITTESTS=OFF \
+	-DENABLE_SYSTEM_JSONCPP=OFF \
+	-DLUA_INCLUDE_DIR=../../luajit/src/ \
+	-DLUA_LIBRARY=../../luajit/src/libluajit.a
+ninja
+
+objcopy --only-keep-debug ../bin/luanti luanti.debug
+objcopy --strip-debug --add-gnu-debuglink=luanti.debug ../bin/luanti
+
+ninja install
+
+cd AppDir
+
+# Put desktop and icon at root
+ln -sf usr/share/applications/org.luanti.luanti.desktop luanti.desktop
+ln -sf usr/share/icons/hicolor/128x128/apps/luanti.png luanti.png
+ln -sf luanti.png .DirIcon
+
+# Fix locales
+mv usr/share/locale usr/share/luanti
+
+cat > AppRun <<\APPRUN
+#!/bin/sh
+APP_PATH="$(dirname "$(readlink -f "${0}")")"
+export LD_LIBRARY_PATH="${APP_PATH}"/usr/lib/:"${LD_LIBRARY_PATH}"
+exec "${APP_PATH}/usr/bin/luanti" "$@"
+APPRUN
+chmod +x AppRun
+
+# List of libraries from the system that should be bundled in the AppImage.
+INCLUDE_LIBS=(
+	libopenal.so.1
+	libSDL2-2.0.so.0
+	 libsndio.so.7.0
+	  libbsd.so.0
+	   libmd.so.0
+	libjpeg.so.62
+	libpng16.so.16
+	libvorbisfile.so.3
+	 libogg.so.0
+	 libvorbis.so.0
+	libzstd.so.1
+	libsqlite3.so.0
+	libleveldb.so.1d
+	 libsnappy.so.1
+)
+
+mkdir -p usr/lib/
+for i in "${INCLUDE_LIBS[@]}"; do
+	cp /usr/lib/aarch64-linux-gnu/$i usr/lib/
+done
+
+# Copy over SDL2
+cp /usr/lib/aarch64-linux-gnu/libSDL2-2.0.so.0 usr/lib/
+
+# Actually build the appimage
+cd ..
+ARCH=aarch64 ./appimagetool --appimage-extract-and-run AppDir/
+
+# Move the appimage to ~
+mv Luanti-aarch64.AppImage ../../luanti-5.15.0-aarch64.AppImage
+
+# Clean up
+cd ../..
+
+rm -rf luanti/
+rm -rf luajit/
+
+echo "Done!"