diff --git a/build.sh b/build.sh
index 25bd025..ec787f9 100644
--- a/build.sh
+++ b/build.sh
@@ -1,10 +1,9 @@
 #!/bin/bash -e
 
 # run this script on an aarch64 computer, running modern debian or
-# something similar, otherwise it's not going to work...
+#    something similar, otherwise it's not going to work...
 
-VERSION="5.16.1"
-SDL_VERSION="2.32.10"
+VERSION="5.15.2"
 
 BOLD="\x1b[1m"
 RED="\x1b[31m"
@@ -12,14 +11,13 @@ GREEN="\x1b[32m"
 RESET="\x1b[0m"
 
 # make sure we are root
-if [ "$(id -u)" != "0" ]; then
+if [ "$(id -u)" != 0 ]; then
 	echo -e "${BOLD}${RED}This script must be run as root!${RESET}"
 	exit 1
 fi
 
 # install deps
 echo -e "${BOLD}Downloading deps...${RESET}"
-
 apt-get install -y --no-install-recommends \
 	git \
 	g++ \
@@ -48,19 +46,12 @@ apt-get install -y --no-install-recommends \
 	ca-certificates \
 	file
 
-# download luajit, SDL2, and luanti source code
-echo -e "${BOLD}Downloading LuaJIT, SDL2, and Luanti source code...${RESET}"
+# download source code
+echo -e "${BOLD}Downloading LuaJIT and Luanti source code...${RESET}"
 git clone --depth=1 https://github.com/LuaJIT/LuaJIT.git luajit
 curl -Lo luanti.zip https://github.com/luanti-org/luanti/archive/refs/tags/${VERSION}.zip
-curl -Lo sdl2.zip https://github.com/libsdl-org/SDL/releases/download/release-${SDL_VERSION}/SDL2-${SDL_VERSION}.zip
-
 unzip luanti.zip
 mv luanti-${VERSION} luanti/
-rm luanti.zip
-
-unzip sdl2.zip
-mv SDL2-${SDL_VERSION} sdl2
-rm sdl2.zip
 
 # compile luajit
 echo -e "${BOLD}Compiling LuaJIT...${RESET}"
@@ -68,26 +59,6 @@ cd luajit
 make amalg -j$(nproc)
 cd ..
 
-# compile sdl2
-echo -e "${BOLD}Compiling SDL2...${RESET}"
-cd sdl2
-
-mkdir build
-cd build
-
-cmake .. -G Ninja \
-	-DSDL_INSTALL_CMAKEDIR=usr/lib/cmake/SDL2 \
-	-DCMAKE_BUILD_TYPE=Release \
-	-DCMAKE_INSTALL_PREFIX=/ \
-	-DCMAKE_C_FLAGS="-DSDL_LEAN_AND_MEAN=1" \
-	-DSDL_{AUDIO,RENDER,VULKAN,TEST,STATIC}=OFF
-
-ninja -j$(nproc)
-strip -s *.so
-DESTDIR="../../" ninja install -j$(nproc)
-
-cd ../..
-
 # prepare to compile luanti
 cd luanti
 mkdir -p build
@@ -97,7 +68,7 @@ echo -e "${BOLD}Downloading AppImageTool${RESET}"
 curl -Lo appimagetool https://github.com/AppImage/appimagetool/releases/download/continuous/appimagetool-aarch64.AppImage
 chmod +x appimagetool
 
-# compile luanti
+# compile and install into AppDir
 echo -e "${BOLD}Compiling Luanti...${RESET}"
 cmake .. -G Ninja \
 	-DCMAKE_BUILD_TYPE=Release \
@@ -107,14 +78,13 @@ cmake .. -G Ninja \
 	-DLUA_INCLUDE_DIR=../../luajit/src/ \
 	-DLUA_LIBRARY=../../luajit/src/libluajit.a
 
-# install into the AppDir folder
 ninja install -j$(nproc)
 
 # build the appimage itself
 cd AppDir
 
 echo -e "${BOLD}Building AppImage...${RESET}"
-# put desktop and icon at root of 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
@@ -123,7 +93,7 @@ ln -sf luanti.png .DirIcon
 mv usr/share/locale usr/share/luanti
 
 cat > AppRun <<'EOF'
-#!/bin/bash
+#!/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" "$@"
@@ -134,6 +104,7 @@ chmod +x AppRun
 # bundle the libraries
 INCLUDE_LIBS=(
 	libopenal.so.1
+	libSDL2-2.0.so.0
 	libsndio.so.7.0
 	libbsd.so.0
 	libmd.so.0
@@ -153,9 +124,6 @@ for i in "${INCLUDE_LIBS[@]}"; do
 	cp /usr/lib/aarch64-linux-gnu/${i} usr/lib/
 done
 
-# copy our SDL2 into place
-cp ../../../usr/lib/libSDL2-2.0.so.0 usr/lib/
-
 # finally make the appimage
 cd ..
 ARCH=aarch64 ./appimagetool --appimage-extract-and-run AppDir/
@@ -166,9 +134,7 @@ mv Luanti-aarch64.AppImage ../../luanti-${VERSION}-aarch64.AppImage
 # clean up
 cd ../..
 
-rm -rf luanti/
-rm -rf sdl2/
-rm -rf usr/
+rm -rf luanti{,.zip}
 rm -rf luajit/
 
 # done :D
diff --git a/test.sh b/test.sh
index 9e2638d..fde109a 100644
--- a/test.sh
+++ b/test.sh
@@ -3,7 +3,7 @@
 # test the AppImage built with build.sh
 # again, this only works on aarch64
 
-VERSION="5.16.1"
+VERSION="5.15.2"
 
 BOLD="\x1b[1m"
 RED="\x1b[31m"