Plugin Error: no such file or directory

[stabldev]

so I've this config:

rollupPlugins: {
  before: [
    copy({
      targets: [
        { src: '../../node_modules/webtorrent/dist/sw.min.js', dest: './www/' },
        { src: '../../node_modules/webtorrent/dist/sw.min.js', dest: './dist/' },
      ],
      verbose: true,
      copyOnce: true,
    })
  ]
}

on the first build it works (if there is no sw.min.js file in destination), but on further builds- it fails with:

[54:24.0]  @stencil/core
[54:24.5]  v4.23.0 🐣
[54:26.5]  build, core-video-player, prod mode, started ...
[54:26.5]  transpile started ...
[54:29.6]  transpile finished in 3.08 s
[54:29.6]  generate custom elements + source maps started ...
[54:29.6]  generate lazy + source maps started ...
copied:
copied:
[54:30.9]  generate lazy + source maps finished in 1.29 s
  ../../node_modules/webtorrent/dist/sw.min.js → www/sw.min.js
  ../../node_modules/webtorrent/dist/sw.min.js → dist/sw.min.js
[54:31.0]  generate custom elements + source maps finished in 1.43 s
[54:31.0]  copy started ...
[54:31.0]  copy finished (2 files) in 32 ms

[ ERROR ]  Rollup: Plugin Error
           ENOENT: no such file or directory, unlink 'www/sw.min.js' (plugin: copy, buildEnd)

[54:31.0]  build failed in 4.59 s