diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eb6cadc..26ee50b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -247,6 +247,14 @@ jobs:
           mkdir -p artifacts/package
           npm pack --ignore-scripts --pack-destination artifacts/package
 
+      - name: Verify package excludes native build sources
+        run: |
+          set -euo pipefail
+          if tar -tzf artifacts/package/*.tgz | grep -Eq '^package/(binding\.gyp|libopus/|src/)'; then
+            echo "Release package must contain only prebuilt native binaries." >&2
+            exit 1
+          fi
+
       - name: Verify the packed module in native Alpine arm64
         run: |
           set -euo pipefail
diff --git a/README.md b/README.md
index 1210cf3..0c3a36c 100644
--- a/README.md
+++ b/README.md
@@ -11,13 +11,13 @@ It exposes a small JavaScript API backed by N-API native bindings so you can enc
 **Key traits:**
 
 - **ESM-only**: the package uses native ES modules; you must `import` it (no `require()`).
-- **Prebuilt binaries**: GitHub Actions publishes binaries for Linux, macOS, Windows (including musl) so install usually finishes without a compiler.
+- **Prebuilt binaries**: GitHub Actions publishes binaries for Linux, macOS, Windows, and OpenBSD (including Linux musl), so installation never requires a compiler.
 - **Node 24+**: built against current Node headers and includes prebuilds for the active LTS line.
 - **Minimal surface**: exposes an `OpusEncoder` class with encode/decode helpers plus passthrough CTL access—ideal for bots, streaming services, or testing harnesses that want full control over buffers.
 
 Prebuilt binaries are provided for the platforms listed below; you do not need a system libopus installed.
 
-If no prebuild is available for your target, npm will fall back to `node-gyp-build`, so you can still compile from source as long as a C/C++ toolchain is present.
+This package is prebuild-only. An installation target without a matching prebuild is unsupported.
 
 ---
 
@@ -301,17 +301,19 @@ try {
 
 ## Platform support
 
-> ⚠ **Node.js 20.0.0 or newer is required.**
+> ⚠ **Node.js 24.0.0 or newer is required.**
 
 Prebuilt binaries are provided for:
 
 | Operating System | Architectures |
 | ---------------- | ------------- |
-| Linux            | x64, arm64    |
+| Linux (glibc)    | x64, arm64    |
+| Linux (musl)     | x64, arm64    |
 | macOS            | x64, arm64    |
 | Windows          | x64           |
+| OpenBSD          | x64           |
 
-If a prebuilt binary is not available for your platform, Node will attempt to build from source during installation; this requires a working C/C++ toolchain and build tools for your OS.
+If a prebuilt binary is not available for your platform, the package cannot be used on that platform.
 
 ---
 
diff --git a/package.json b/package.json
index 9b9ef76..61f4b17 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "libopus-node",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "description": "libopus bindings for Node",
   "keywords": [
     "binary",
@@ -17,6 +17,10 @@
     "type": "git",
     "url": "git+https://github.com/biw/libopus-node.git"
   },
+  "files": [
+    "dist",
+    "prebuilds"
+  ],
   "type": "module",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
@@ -27,7 +31,6 @@
     }
   },
   "scripts": {
-    "install": "node-gyp-build",
     "build-native": "node-gyp-build",
     "build-package": "vp pack",
     "build": "vp run build-native && vp pack",