diff --git a/gem5/build b/gem5/build
index 1d40bd7..6fe32c9 100755
--- a/gem5/build
+++ b/gem5/build
@@ -40,8 +40,8 @@ if [ "$arch" = x86_64 ]; then
 elif [ "$arch" = arm ] || [ "$arch" = aarch64 ]; then
   scons -j "$j" --ignore-style "${outdir}/build/ARM/gem5.opt"
   make -C ./system/arm/dt/
-  mkdir -p "${outdir}/system/arm/dt"
-  cp ./system/arm/dt/*.dtb "${outdir}/system/arm/dt"
+  mkdir -p "${system_dir}/arm/dt"
+  cp ./system/arm/dt/*.dtb "${system_dir}/arm/dt"
   # TODO use the buildroot cross compiler here, and remove the dependencies from configure.
   make -C ./system/arm/simple_bootloader/ $cross_compile
   cp ./system/arm/simple_bootloader/boot_emm.arm "$binaries_dir"