Why are these tsconfig paths not working?

I have no idea why this is now working on the eleventh time I tried (yet didn’t the first 10), but the /* seems to be the secret sauce, and the example in the docs is apparently pointing to a specific file (and the file extension is omitted).

{
    "compilerOptions": {
        "baseUrl": "./src", // setting a value for baseUrl is required
        "moduleResolution": "node", // was not set before, but is the default
        "paths": {
            "@client/*": [
                "client/*",
            ],
            "@suir/*": [ // notice the `/*` at the end
                "../node_modules/semantic-ui-react/dist/commonjs/*", // notice the `/*`
            ],
        },
        // …
    },
    "include": [
        "./src/client/**/*",
    ],
}