Jest cannot import module from node_modules which contains a '@' at start

I have a problem when i launch my tests with Jest (29.7.0) and Angular (19.0) on components who import the library "@qtm/angular"

I have this message

` ● Test suite failed to run

Cannot find module '@qtm/angular' from 'src/app/core/header/header.component.ts'

Require stack:
src/app/core/header/header.component.ts
src/app/core/header/header.component.spec.ts

1 | import {Component, signal} from '@angular/core';
> 2 | import {QtmComponentLibraryModule} from '@qtm/angular';
| ^
3 | import {SideNavComponent} from '../../shared/components/side-nav/side-nav.component';
4 | import {NgOptimizedImage} from '@angular/common';
5 | import packageJson from '../../../../package.json';

at Resolver._throwModNotFoundError (node_modules/jest-resolve/build/resolver.js:427:11)
at Object.<anonymous> (src/app/core/header/header.component.ts:2:1)
at Object.<anonymous> (src/app/core/header/header.component.spec.ts:3:1)`


I tried to use paths in compilerOptions in tsconfig with and without also moduleNameMapper in jest.config.js but the only change i have in the error message is this:

` ● Test suite failed to run

Configuration error:

Could not locate module @qtm/angular mapped as:
[
"C:\\Users\\my-user\\MyApp\\workspace\\my-project\\node_modules\\@qtm\\angular"
].

Please check your configuration for these entries:
{
"moduleNameMapper": {
"/@qtm\/angular/": "[
"C:\\Users\\my-user\\MyApp\\workspace\\my-project\\node_modules\\@qtm\\angular"
]"
},
"resolver": undefined
}`


the message indicate the right path, working correctly in my windows explorer..

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