Providing an interface to nixpkgs.config

[fuzzypixelz]

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Would your feature fix an existing issue?

I recently needed to set nixpkgs.config.firefox.enablePlasmaBrowserIntegration = true; and the only way I think that can be done (correct me if I'm wrong) is modifying lib/default.nix, specifically the pkgImport function.

This is also where allowUnfree = true is set (I'm all for sane defaults, but this is very implicit).

Describe the solution you'd like

Maybe collect nixpkgs.config from within the nix` folder? I'm not very familiar with the structure of devos so I can't say many things (again, this might be a non-existent issue and I don't know how it's done)

Describe alternatives you've considered

Additional context

No. I don't think so.

See https://github.com/NixOS/nixpkgs/blob/nixos-unstable/pkgs/applications/networking/browsers/firefox/wrapper.nix#L56
for example. There are many useful (and often necessary) options you might want to set.

I for example needed to activation KDE framework integration in firefox, something that nixos modules can't do (a different build is needed).

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[blaggacao]

This is also where allowUnfree = true is set (I'm all for sane defaults, but this is very implicit).

This is a huge issue, indeed. It is being worked on in the context of #232, specifically https://github.com/divnix/devos/pull/232/files#diff-b161966f7254af9c9c5382e859495c69622843e4602a6bb4208e08134e660121R138

[blaggacao]

This is going to be solved in api-next branch which exposes hostDefaults.config or host.config.

In an effort to clean up issues, I'm going to close this