diff --git a/CHANGELOG.md b/CHANGELOG.md
index 04ad7bd6279..633f0f06b45 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ Docs: https://docs.openclaw.ai
 
 ### Fixes
 
+- Installer: install Node.js through `apk` on Alpine Linux instead of falling through to the NodeSource package-manager path.
 - Installer: detect musl Linux shells such as Alpine as Linux instead of rejecting them before npm install.
 - Control UI: split large build-time runtime dependencies into stable chunks so Linux/Docker install and package builds stay below the app chunk warning threshold.
 - Scripts: run the optional Discord native opus installer through the shared pnpm launcher and Windows CI coverage so native Windows installs avoid shell-mode package-manager shims.
diff --git a/scripts/install.sh b/scripts/install.sh
index 4979e7692dd..b7fbbe47155 100755
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -1621,6 +1621,21 @@ check_node() {
     fi
 }
 
+finish_linux_node_install() {
+    activate_supported_node_on_path || true
+    if ! node_is_at_least_required; then
+        local active_path active_version
+        active_path="$(command -v node 2>/dev/null || echo "not found")"
+        active_version="$(node -v 2>/dev/null || echo "missing")"
+        ui_error "Installed Node.js must be v${NODE_MIN_VERSION}+ but this shell is using ${active_version} (${active_path})"
+        echo "Upgrade the system Node.js package or install Node.js ${NODE_DEFAULT_MAJOR} manually, then rerun the installer."
+        exit 1
+    fi
+
+    ui_success "Node.js v$(node -v | cut -d'v' -f2) installed"
+    print_active_node_paths || true
+}
+
 # Install Node.js
 install_node() {
     if [[ "$OS" == "macos" ]]; then
@@ -1653,9 +1668,18 @@ install_node() {
             else
                 run_quiet_step "Installing Node.js" sudo pacman -Sy --noconfirm nodejs npm
             fi
-            promote_supported_node_binary || true
-            ui_success "Node.js v${NODE_DEFAULT_MAJOR} installed"
-            print_active_node_paths || true
+            finish_linux_node_install
+            return 0
+        fi
+
+        if command -v apk &> /dev/null; then
+            ui_info "Installing Node.js via apk (Alpine Linux detected)"
+            if is_root; then
+                run_quiet_step "Installing Node.js" apk add --no-cache nodejs npm
+            else
+                run_quiet_step "Installing Node.js" sudo apk add --no-cache nodejs npm
+            fi
+            finish_linux_node_install
             return 0
         fi
 
@@ -1699,9 +1723,7 @@ install_node() {
             exit 1
         fi
 
-        ui_success "Node.js v${NODE_DEFAULT_MAJOR} installed"
-        activate_supported_node_on_path || true
-        print_active_node_paths || true
+        finish_linux_node_install
     fi
 }
 
diff --git a/test/scripts/install-sh.test.ts b/test/scripts/install-sh.test.ts
index ab7096b23c4..c70417ae182 100644
--- a/test/scripts/install-sh.test.ts
+++ b/test/scripts/install-sh.test.ts
@@ -39,6 +39,46 @@ describe("install.sh", () => {
     expect(script).not.toContain('[[ "$OSTYPE" == "linux-gnu"* ]]');
   });
 
+  it("installs Node.js with apk on Alpine before falling back to NodeSource", () => {
+    expect(script).toContain("finish_linux_node_install()");
+    expect(script).toContain('ui_info "Installing Node.js via apk (Alpine Linux detected)"');
+    expect(script).toContain(
+      'run_quiet_step "Installing Node.js" apk add --no-cache nodejs npm',
+    );
+    expect(script).toContain(
+      'run_quiet_step "Installing Node.js" sudo apk add --no-cache nodejs npm',
+    );
+    expect(script).toContain('if ! node_is_at_least_required; then');
+
+    const apkIndex = script.indexOf('if command -v apk &> /dev/null; then');
+    const nodeSourceIndex = script.indexOf('ui_info "Installing Node.js via NodeSource"');
+    expect(apkIndex).toBeGreaterThan(-1);
+    expect(nodeSourceIndex).toBeGreaterThan(apkIndex);
+  });
+
+  it("uses the apk Node.js installer path on Alpine", () => {
+    const result = runInstallShell(`
+      set -euo pipefail
+      source "${SCRIPT_PATH}"
+      OS=linux
+      require_sudo() { :; }
+      install_build_tools_linux() { return 0; }
+      is_root() { return 0; }
+      ui_info() { printf 'info:%s\\n' "$*"; }
+      ui_success() { printf 'success:%s\\n' "$*"; }
+      run_quiet_step() { printf 'step:%s|%s\\n' "$1" "\${*:2}"; }
+      apk() { :; }
+      finish_linux_node_install() { printf 'finish-linux-node\\n'; }
+      install_node
+    `);
+
+    expect(result.status).toBe(0);
+    expect(result.stdout).toContain("info:Installing Node.js via apk (Alpine Linux detected)");
+    expect(result.stdout).toContain("step:Installing Node.js|apk add --no-cache nodejs npm");
+    expect(result.stdout).toContain("finish-linux-node");
+    expect(result.stdout).not.toContain("Installing Node.js via NodeSource");
+  });
+
   it("clears npm freshness filters for package installs", () => {
     expect(script).toContain("env -u NPM_CONFIG_BEFORE -u npm_config_before");
     expect(script).toContain('freshness_flag="--min-release-age=0"');