I'm trying to use bignumber.js with typescript, and everything is fine if I just run react-scripts start, typescript picks up the correct library when I wite import { BigNumber } from "bignumber.js";.

However, once I build the project by running tsc && react-scripts build, the built version doesn't use my desired BigNumber class from bignumber.js. Instead, it picks up the BigNumber class from ether.js/bignumber.ts (I also need ether.js in my project). Any idea about why this happens? My compiler option is the following

{
  "compilerOptions": {
    "target": "ESNext",
    "useDefineForClassFields": true,
    "lib": [
      "DOM",
      "DOM.Iterable",
      "ESNext"
    ],
    "types": [
      "node",
      "webpack-env" // here
    ],
    "baseUrl": ".",
    "allowJs": true,
    "skipLibCheck": true,
    "esModuleInterop": false,
    "allowSyntheticDefaultImports": true,
    "strict": true,
    "forceConsistentCasingInFileNames": true,
    "module": "ESNext",
    "moduleResolution": "Node",
    "resolveJsonModule": true,
    "isolatedModules": true,
    "noEmit": true,
    "jsx": "react-jsx",
    "noFallthroughCasesInSwitch": true
  },
  "include": [
    "./src"
  ]
}