workflow build fails with "No loader is configured for .md files" with aliased paths

[gdaybrice]

After upgrading to the latest version of workflow (specifically following the changes in PR 705), the workflow build fails during the "Discovering workflow directives" phase if a scanned TypeScript file imports a Markdown (.md) file with an aliased path.

This is the turbopack config in next.config.js that used to work before beta.40

  turbopack: {
    rules: {
      '*.md': {
        loaders: ['raw-loader'],
        as: '*.js',
      },
    },
  },

Environment
Workflow Version: 4.0.1-beta.41
Next.js Version: 15.x / 16.x
Package Manager: bun
OS: macOS (Darwin 24.6.0)