diff --git a/install2.sh b/install2.sh
new file mode 100755
index 0000000..8f23bfb
--- /dev/null
+++ b/install2.sh
@@ -0,0 +1,41 @@
+#!/usr/bin/bash -E
+
+## CONSTANTS
+
+MAIN_TAR_GZ_URL="https://git.artcode.re/miaou/miaou-bash/archive/main.tar.gz"
+
+## FUNCTIONS
+
+function bootstrap {
+  cd "$(mktemp -d)" || exit 3
+  curl -s -O $MAIN_TAR_GZ_URL
+  tar -xzf main.tar.gz --directory "$(dirname $MIAOU_BASH_DIR)"
+}
+
+function assert_supported_distro {
+  grep -E '^ID=debian|^ID_LIKE=debian' /etc/os-release ||
+    grep -E '^ID=arch|^ID_LIKE=arch' /etc/os-release
+}
+
+## MAIN
+
+set -Eeuo pipefail
+
+! assert_supported_distro && echo 'unsupported distro: debian-like OR arch-like expected' && exit 2
+deployment_type_adjective="${1:-installed}"
+[[ ! -v MIAOU_BASH_DIR ]] && MIAOU_BASH_DIR=/opt/miaou-bash && export MIAOU_BASH_DIR
+
+if [[ "$UID" -ne 0 ]]; then
+  sudo -vp 'root privilege required: '
+  sudo '$0' "$deployment_type_adjective"
+  exec bash -l
+else
+  if [[ -d "$MIAOU_BASH_DIR" && -L /etc/inputrc && "$(readlink /etc/inputrc)" == "$MIAOU_BASH_DIR"/etc/inputrc ]]; then
+    . "$MIAOU_BASH_DIR"/bin/miaou-bash "$MIAOU_BASH_DIR/lib/self-upgrade.bash"
+  else
+    bootstrap
+    . "$MIAOU_BASH_DIR"/bin/miaou-bash "$MIAOU_BASH_DIR/lib/initiate.bash"
+    echo "miaou-bash successfully $deployment_type_adjective"
+    exec bash -l
+  fi
+fi