diff --git a/build.sh b/build.sh
index 1cac5d8..dbb5110 100755
--- a/build.sh
+++ b/build.sh
@@ -5,4 +5,8 @@ cd "$(dirname "$0")"
 
 # Build
 cd workspace/build
-exec ../crosstool-ng/bin/ct-ng build
\ No newline at end of file
+for type in */; do
+    cd "${type}"
+    ../../crosstool-ng/bin/ct-ng build
+    cd ../
+done
\ No newline at end of file
diff --git a/prepare.sh b/prepare.sh
index 2e9b0f2..eb64112 100755
--- a/prepare.sh
+++ b/prepare.sh
@@ -3,6 +3,12 @@
 set -e
 cd "$(dirname "$0")"
 
+# Check
+if [ "$(uname -m)" != 'x86_64' ]; then
+    echo 'Unsupported Build System!' > /dev/stderr
+    exit 1
+fi
+
 # Versions
 CT_NAME="crosstool-ng"
 CT_VERSION="1.27.0"
@@ -46,6 +52,13 @@ patch 9999-change-page-size.patch
 export PATH="${PREFIX}/bin:${PATH}"
 cd "${WORKSPACE}"
 dir build
-cp "${SRC}/defconfig" .
-ct-ng defconfig
-ct-ng show-config
\ No newline at end of file
+prepare() {
+    dir "$1"
+    cp "${SRC}/defconfig" .
+    printf "$2" >> defconfig
+    ct-ng defconfig
+    ct-ng show-config
+    cd ../
+}
+prepare x86_64 ''
+prepare aarch64 'CT_CANADIAN=y\nCT_HOST="aarch64-linux-gnu"\n# CT_ZSTD_NEEDED is not set\n'
\ No newline at end of file