diff --git a/manual-build/archos-bootstrap b/manual-build/archos-bootstrap
index 01f8f97..77c702a 100644
--- a/manual-build/archos-bootstrap
+++ b/manual-build/archos-bootstrap
@@ -1,5 +1,12 @@
 #!/bin/bash
 
+# shellcheck disable=SC2059 # $1 and $2 can contain the printf modifiers
+out() { printf "$1 $2\n" "${@:3}"; }
+error() { out "==> ERROR:" "$@"; } >&2
+warning() { out "==> WARNING:" "$@"; } >&2
+msg() { out "==>" "$@"; }
+die() { error "$@"; exit 1; }
+
 chroot_add_mount() {
   mount "$@" && CHROOT_ACTIVE_MOUNTS=("$2" "${CHROOT_ACTIVE_MOUNTS[@]}")
 }