diff --git a/publish.sh b/publish.sh
index 94621ea..12314a8 100755
--- a/publish.sh
+++ b/publish.sh
@@ -6,11 +6,23 @@ set -e
 npm --no-git-tag-version version ${semver}
 npm run build
 cp package.json build/
-sed -i '' -E 's/"build"/"*"/' build/package.json
 
-sed -i '' 's#"build/cjs/index.js"#"cjs/index.js"#' build/package.json
-sed -i '' 's#"build/es/index.js"#"es/index.js"#' build/package.json
-sed -i '' 's#"build/types/index.d.ts"#"types/index.d.ts"#' build/package.json
+# Use Node.js for portable package.json normalization
+# Pass the target path via env var to avoid Node treating it as a module/script argument
+PKG_PATH="$(pwd)/build/package.json" node - <<'EOF'
+const fs = require('fs');
+const path = process.env.PKG_PATH;
+const pkg = JSON.parse(fs.readFileSync(path, 'utf8'));
+pkg.private = false;
+delete pkg.scripts;
+delete pkg.devDependencies;
+if (!pkg.files) pkg.files = ['*'];
+else pkg.files = pkg.files.map(x => x === 'build' ? '*' : x);
+['main','module','types'].forEach(k => {
+	if (pkg[k]) pkg[k] = pkg[k].replace(/^build\//, '');
+});
+fs.writeFileSync(path, JSON.stringify(pkg, null, 2) + '\n');
+EOF
 
 cd build
 npm publish --access public --loglevel verbose