File webpack.config.js of Package failed_element-web

```javascript
const path = require('path');
const { DefinePlugin } = require('webpack');

// Check if Sentry CLI should be skipped
const skipSentryCli = process.env.SENTRYCLI_SKIP_DOWNLOAD === '1';

module.exports = {
    mode: 'production',
    entry: './src/index.js',
    output: {
        filename: 'bundle.js',
        path: path.resolve(__dirname, 'dist'),
    },
    plugins: [
        new DefinePlugin({
            'process.env.SENTRYCLI_SKIP_DOWNLOAD': JSON.stringify(skipSentryCli),
        }),
    ],
    module: {
        rules: [
            {
                test: /\.js$/,
                exclude: /node_modules/,
                use: {
                    loader: 'babel-loader',
                },
            },
        ],
    },
    // Conditionally disable Sentry CLI
    ...(skipSentryCli
        ? {}
        : {
              // Sentry CLI configuration (if needed)
              sentryCli: {
                  include: './dist',
                  ignore: ['node_modules'],
              },
          }),
};
```

### Explanation of Changes
1. **Environment Variable Check**: The `process.env.SENTRYCLI_SKIP_DOWNLOAD` variable is checked to determine whether to skip Sentry CLI usage.
2. **Conditional Sentry Configuration**: If `SENTRYCLI_SKIP_DOWNLOAD` is set to `1`, the Sentry CLI configuration is omitted from the Webpack setup.
3. **DefinePlugin**: The `DefinePlugin` ensures that the `SENTRYCLI_SKIP_DOWNLOAD` value is available in the application code if needed.

### Additional Notes
- The `webpack.config.js` file assumes a basic structure. If the actual file has additional configurations, they should be preserved while applying the above changes.
- Ensure that the `yarn install` step includes all necessary dependencies for the build process.

After applying this fix, rebuild the package to verify that the issue is resolved.