diff --git a/README_en.md b/README_en.md
index b21140d..32e7d6c 100644
--- a/README_en.md
+++ b/README_en.md
@@ -30,7 +30,7 @@ ROS 2 packages for controlling the **KUKA LBR IIWA 7 R800**: communication with
 Install everything with a single command:
 
 ```bash
-bash <(curl -fsSL https://gitverse.ru/api/repos/daniel-robotics/lightweight-cobot/raw/branch/main/install.sh)
+curl -fsSL https://gitverse.ru/api/repos/daniel-robotics/lightweight-cobot/raw/branch/master/install.sh | bash
 ```
 
 The script installs ROS 2 Jazzy, Webots, builds the workspace, and installs the `cobot` CLI.
diff --git a/install.sh b/install.sh
index 4a1845c..8be0fba 100644
--- a/install.sh
+++ b/install.sh
@@ -22,6 +22,10 @@ BOLD='\033[1m'
 PYTHON_VERSION="3.11"
 REPO_URL="https://gitverse.ru/daniel-robotics/lightweight-cobot.git"
 
+# Branch to clone. Override via: curl ... | bash -s dev
+# Defaults to master when not specified.
+REPO_BRANCH="${REPO_BRANCH:-${1:-master}}"
+
 # Where to clone the project. Can be overridden by the user with COBOT_INSTALL_DIR.
 # Куда клонировать проект. Пользователь может переопределить через COBOT_INSTALL_DIR.
 INSTALL_DIR="${COBOT_INSTALL_DIR:-$HOME/.lwc}"
@@ -215,8 +219,7 @@ check_python() {
 resolve_install_dir() {
     local script_dir
     script_dir="$(cd "$(dirname "${BASH_SOURCE[0]:-$0}")" 2>/dev/null && pwd || pwd)"
-    local repo_branch
-    repo_branch="${REPO_BRANCH:-$(git -C "$script_dir" rev-parse --abbrev-ref HEAD 2>/dev/null || echo "master")}"
+    local repo_branch="$REPO_BRANCH"
 
     # Running directly from inside the cloned repo (not via curl|bash)
     if [ -f "$script_dir/setup.py" ] && [ -d "$script_dir/.git" ]; then