Intenté usar el diseño con nombre, pero cuando npm run dev --open me da este error

 > Files and directories prefixed with __ are reserved (saw src/routes/auth/__layout-auth.svelte) at file:///home/gwendal/Documents/SvelteKit/ninja-gaming/node_modules/@sveltejs/kit/dist/chunks/sync.js:193:11 at Array.forEach (<anonymous>) at walk (file:///home/gwendal/Documents/SvelteKit/ninja-gaming/node_modules/@sveltejs/kit/dist/chunks/sync.js:178:32) at file:///home/gwendal/Documents/SvelteKit/ninja-gaming/node_modules/@sveltejs/kit/dist/chunks/sync.js:235:5 at Array.forEach (<anonymous>) at walk (file:///home/gwendal/Documents/SvelteKit/ninja-gaming/node_modules/@sveltejs/kit/dist/chunks/sync.js:211:9) at create_manifest_data (file:///home/gwendal/Documents/SvelteKit/ninja-gaming/node_modules/@sveltejs/kit/dist/chunks/sync.js:296:2) at update (file:///home/gwendal/Documents/SvelteKit/ninja-gaming/node_modules/@sveltejs/kit/dist/chunks/sync.js:911:24) at update_manifest (file:///home/gwendal/Documents/SvelteKit/ninja-gaming/node_modules/@sveltejs/kit/dist/chunks/index.js:59:31) at Object.configureServer (file:///home/gwendal/Documents/SvelteKit/ninja-gaming/node_modules/@sveltejs/kit/dist/chunks/index.js:191:4)

Tengo un diseño llamado __layout-auth.svelte ubicado en src/routes/auth