Type 'Signal<boolean>' is not assignable to type 'Signal<unknown>'

I am working on an app which is using a pretty simple signal store. It worked the last days but suddenly today I got the following error:

Type 'Signal<boolean>' is not assignable to type 'Signal<unknown>'.
Type 'Signal<boolean>' is not assignable to type '{ [SIGNAL]: unknown; }'.ts(2322)


The strange thing is that I didn't change anything, and the examples on the NgRx page are exactly the same. Even when I copy the code into another repository it works.

I already tried to reinstall everything even with different versions.

import { signalStore, withComputed, withState } from '@ngrx/signals';
import { computed } from '@angular/core';

type ProjectState = {
projects: {name: string}[];
isLoading: boolean;
};

const initialState: ProjectState = {
projects: [{ name: 'test' }],
isLoading: false
};

export const ProjectStore = signalStore(
{ providedIn: 'root' },
withState(initialState),
withComputed(({ projects }) => ({
hasProjects: computed(() => !!projects().length)
}))
);


I am using Angular 19.2.6, @ngrx/signals 19.1.0 and NX 20.8.0. What could cause this?

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