4.9.0 fails with "Cannot find module './camel-case' or its corresponding type declarations"

[mperdikeas]

typescript@5.3.2 type-fest@4.9.0 fails with the following messages:

Cannot find module './source/camel-case' or its corresponding type declarations. (6 instances of this error)
Cannot find module './source/join' or its corresponding type declarations. (1 instance of this error)

Indeed, looking at the node-modules directory it does appear these files are missing:

$ ls node_modules/type-fest/source/camel*
.... 1159 Oct 26  1985 node_modules/type-fest/source/camel-cased-properties-deep.d.ts
...  798 Oct 26  1985 node_modules/type-fest/source/camel-cased-properties.d.ts
$ ls node_modules/type-fest/source/join*
ls: cannot access 'node_modules/type-fest/source/join*': No such file or directory

I have no explanation or mental modal as to how it is even possible that these files are missing since I have version 4.9.0 and the files appear on the github.com view of the repo (but not in my local node-modules).

$ npm ls --depth=0 | grep type-fest
├── type-fest@4.9.0

tsconfig.json is:

{
  "compilerOptions": {
    "target": "ES2020",
    "useDefineForClassFields": true,
    "lib": ["ES2020", "DOM", "DOM.Iterable"],
    "module": "ESNext",
   
    /* Bundler mode */
    "moduleResolution": "bundler",
    "allowImportingTsExtensions": true,
    "resolveJsonModule": true,
    "isolatedModules": true,
    "noEmit": true,
    "jsx": "react-jsx",

    /* Linting */
    "strict": true,
    "strictNullChecks": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noFallthroughCasesInSwitch": true,
    "baseUrl": "src",
    "paths": {
      "react"           : [ "./node_modules/@types/react" ],
      "@models/*"       : ["models/*"], /* cf.: sse-1703181070 */
      "@assets/*"       : ["assets/*"],
      "@util/*"         : ["util/*"  ],
      "@backend-api/*"  : ["backend-api/*"  ],
    }

  },
  "include": ["src"],
  "references": [{ "path": "./tsconfig.node.json" }]
}

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[mperdikeas]

false; I had a patch operating which tampered with the contents of the node-modules/type-fest directory. 4.9.0 compiles cleanly.