diff --git a/scripts/setup_build b/scripts/setup_build
index b61c9eb79..f416aa154 100755
--- a/scripts/setup_build
+++ b/scripts/setup_build
@@ -10,7 +10,7 @@ BUILD_TYPE=$2
 if [[ $TARGET == windows ]]; then
 	toolchain="-DCMAKE_TOOLCHAIN_FILE=cmake/Modules/Mingw.cmake"
 elif [[ $TARGET == gba ]]; then
-	toolchain="-DCMAKE_TOOLCHAIN_FILE=cmake/Modules/GBA.cmake -DOX_USE_STDLIB=OFF"
+	toolchain="-DCMAKE_TOOLCHAIN_FILE=cmake/Modules/GBA.cmake -DOX_USE_STDLIB=OFF -DCMAKE_INSTALL_PREFIX=$DEVKITARM"
 fi
 
 if [[ $BUILD_TYPE == debug ]]; then