diff --git a/samples/zephyr/build-boot.sh b/samples/zephyr/build-boot.sh
new file mode 100755
index 0000000..20e61a0
--- /dev/null
+++ b/samples/zephyr/build-boot.sh
@@ -0,0 +1,22 @@
+#! /bin/bash
+
+# Build the bootloader.
+
+# In order to build successfully, ZEPHYR_SDK_INSTALL_DIR and
+# ZEPHYR_GCC_VARIANT need to be set, as well as zephyr/zephyr-env.sh
+# must be sourced.
+
+die() {
+    echo error: "$@"
+    exit 1
+}
+
+if [ -z "$ZEPHYR_BASE" ]; then
+    die "Please setup for a Zephyr build before running this script."
+fi
+
+if [ -z "$BOARD" ]; then
+    die "Please set BOARD to a valid board before running this script."
+fi
+
+make -C ../.. BOARD=${BOARD} -j$(nproc) || die "Build mcuboot"