redwood: Missing dependency lodash-decorators after `rwt copy`

After building RW and copying it over to a project I get an error about a missing dependency

tobbe@XPS9550 MINGW64 ~/dev/redwood/redwood-testing (master)
$ yarn rw test
yarn run v1.22.4
$ C:\Users\tobbe\dev\redwood\redwood-testing\node_modules\.bin\rw test
internal/modules/cjs/loader.js:1032
  throw err;
  ^

Error: Cannot find module 'lodash-decorators'
Require stack:
- C:\Users\tobbe\dev\redwood\redwood-testing\node_modules\@redwoodjs\structure\dist\x\decorators.js
- C:\Users\tobbe\dev\redwood\redwood-testing\node_modules\@redwoodjs\structure\dist\ide.js
- C:\Users\tobbe\dev\redwood\redwood-testing\node_modules\@redwoodjs\structure\dist\index.js
- C:\Users\tobbe\dev\redwood\redwood-testing\node_modules\@redwoodjs\cli\dist\commands\diagnostics.js
- C:\Users\tobbe\dev\redwood\redwood-testing\node_modules\yargs\index.js
- C:\Users\tobbe\dev\redwood\redwood-testing\node_modules\@redwoodjs\cli\dist\index.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:1029:15)
    at Function.Module._load (internal/modules/cjs/loader.js:898:27)
    at Module.require (internal/modules/cjs/loader.js:1089:19)
    at require (internal/modules/cjs/helpers.js:73:18)
    at Object.<anonymous> (C:\Users\tobbe\dev\redwood\redwood-testing\node_modules\@redwoodjs\structure\dist\x\decorators.js:32:25)
    at Module._compile (internal/modules/cjs/loader.js:1200:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1220:10)
    at Module.load (internal/modules/cjs/loader.js:1049:32)
    at Function.Module._load (internal/modules/cjs/loader.js:937:14)
    at Module.require (internal/modules/cjs/loader.js:1089:19) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    'C:\\Users\\tobbe\\dev\\redwood\\redwood-testing\\node_modules\\@redwoodjs\\structure\\dist\\x\\decorators.js',
    'C:\\Users\\tobbe\\dev\\redwood\\redwood-testing\\node_modules\\@redwoodjs\\structure\\dist\\ide.js',
    'C:\\Users\\tobbe\\dev\\redwood\\redwood-testing\\node_modules\\@redwoodjs\\structure\\dist\\index.js',
    'C:\\Users\\tobbe\\dev\\redwood\\redwood-testing\\node_modules\\@redwoodjs\\cli\\dist\\commands\\diagnostics.js',
    'C:\\Users\\tobbe\\dev\\redwood\\redwood-testing\\node_modules\\yargs\\index.js',
    'C:\\Users\\tobbe\\dev\\redwood\\redwood-testing\\node_modules\\@redwoodjs\\cli\\dist\\index.js'
  ]
}
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Is anyone else seeing this? Or is it just me? Is it (yet another) Windows issue?

I can work around it by going in to node_modules/@redwoodjs/structure and running yarn install, but that only fixes it until I run rwt copy again