how to set file with layout in dir has index.vue with layout ?

[axolo]

dir

src
`-- pages
    |-- index.vue
    `-- my.vue

file

index.vue

<route>{ meta: { title: 'index.vue', layout: 'default' } }</route>

my.uve

<route>{ meta: { title: 'my.vue', layout: 'my' } }</route>

my.vue got 2 layouts, layout default outside and layout my inside.

how to set my.vue with layout my only?