I'd like to customize, but an error occurs in webpack

[hide34]

HELLO

Could you tell me?
Rebuilding will cause an error. The procedure is as follows
How can I solve it?

yarn add @joblocal/vue-mapfit --dev

cd .\node_modules\@joblocal\vue-mapfit\

yarn install

yarn build

`PS C:\mapfit_test\node_modules@joblocal\vue-mapfit> yarn build
yarn run v1.10.1
warning ......\package.json: No license field
$ webpack -p
Hash: 58151b7c33cbcdb2c6e1
Version: webpack 4.23.1
Time: 360ms
Built at: 2018-10-30 11:13:49
1 asset
Entrypoint main = main.js
[0] ./src/index.js 75 bytes {0} [built]

ERROR in ./src/index.js
Module not found: Error: Can't resolve './components/VueMapfit' in 'C:\mapfit_test\node_modules@joblocal\vue-mapfit\src'
@ ./src/index.js 1:0-47 3:15-24
error Command failed with exit code 2.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
PS C:\mapfit_test\node_modules@joblocal\vue-mapfit>`