Overlays: how to specify a subpackage?

Help
1

My overlay.nix file is pretty simple. It is just:

[ (self: super:

let
  pkgs = self;
  inherit (pkgs) lib;
  callPackage = lib.callPackageWith (pkgs // builtins.removeAttrs pkgs.xorg [ "callPackage" "newScope" "overrideScope" "packages" ]);
  forkNixpkgsPath = /home/fusion809/nixpkgs;

in with pkgs; {
  fork = import forkNixpkgsPath {
    config = {
      allowUnfree = true;
    };
    overlays = [ ];
  };

  openra-git = callPackage (forkNixpkgsPath + /openra) {engines.git};

}) ]

Problem is that last command doesn’t work, it causes this error when built:

       error: syntax error, unexpected '}', expecting '.' or '='
       at /home/fusion809/overlays.nix:17:68:
           16|
           17|   openra-git = callPackage (forkNixpkgsPath + /openra) {engines.git};
             |                                                                    ^
           18|

When I am in the openra directory, however, running nix-build -iA engines.git builds the openra-git package I want. How am I meant to specify that I want openra-git in overlays.nix to be the engines.git subpackage within the openra directory?

2

I have since changed my overlays.nix file to:

[ (self  super:

let
  pkgs = self;
  inherit (pkgs) lib;
  forkNixpkgsPath = /home/fusion809/nixpkgs;

in with pkgs; {
  fork = import forkNixpkgsPath {
    config = {
      allowUnfree = true;
    };
    overlays = [ ];
  };

  openraPackages = import (forkNixpkgsPath + /openra/default.nix); # Import as a set
  openra-git = openraPackages.engines.git; # Access the git engine directly

}) ]

The above error is now gone, but now I get this error when I include openra-git as a package in my system configuration:

error: Package ‘dotnet-sdk-6.0.428’ in /nix/store/ggn93wd5qpvnjrvz7kd0kzx9mxmyqdhp-nixos-24.11/nixos/pkgs/development/compilers/dotnet/build-dotnet.nix:222 is marked as insecure, refusing to evaluate.


       Known issues:
        - Dotnet SDK 6.0.428 is EOL, please use 8.0 (LTS) or 9.0 (Current)

       You can install it anyway by allowing this package, using the
       following methods:

       a) To temporarily allow all insecure packages, you can use an environment
          variable for a single invocation of the nix tools:

            $ export NIXPKGS_ALLOW_INSECURE=1

          Note: When using `nix shell`, `nix build`, `nix develop`, etc with a flake,
                then pass `--impure` in order to allow use of environment variables.

       b) for `nixos-rebuild` you can add ‘dotnet-sdk-6.0.428’ to
          `nixpkgs.config.permittedInsecurePackages` in the configuration.nix,
          like so:

            {
              nixpkgs.config.permittedInsecurePackages = [
                "dotnet-sdk-6.0.428"
              ];
            }

       c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
          ‘dotnet-sdk-6.0.428’ to `permittedInsecurePackages` in
          ~/.config/nixpkgs/config.nix, like so:

            {
              permittedInsecurePackages = [
                "dotnet-sdk-6.0.428"
              ];
            }

Naturally, you’ll probably be telling me to read the error and do what it says. I tried that though. I tried adding:

{
              nixpkgs.config.permittedInsecurePackages = [
                "dotnet-sdk-6.0.428"
              ];
            }

to my configuration.nix file and I still get this error. I’ve also tried running:

export NIXPKGS_ALLOW_INSECURE=1
sudo nixos-rebuild switch --impure

and still I get this error.

3

I also tried updating the version of dotnet sdk and dotnet runtime defined in build-engine.nix to 8_0 instead of 6_0. This causes the package to build successfully, but fails to launch with the error:

You must install or update .NET to run this application.

App: /nix/store/00lhbqbrzczcfr7fhclxs0pif5m79l2j-openra-git-2126f3c5a205654ee0230b4b048369378c7f4471/lib/openra-git/OpenRA.dll
Architecture: x64
Framework: 'Microsoft.NETCore.App', version '6.0.0' (x64)
.NET location: /nix/store/y66v9lxv9gn7jwm6hzdg7kv2szyihn15-dotnet-runtime-8.0.12/share/dotnet/

The following frameworks were found:
  8.0.12 at [/nix/store/y66v9lxv9gn7jwm6hzdg7kv2szyihn15-dotnet-runtime-8.0.12/share/dotnet/shared/Microsoft.NETCore.App]

Learn more:
https://aka.ms/dotnet/app-launch-failed

To install missing framework, download:
https://aka.ms/dotnet-core-applaunch?framework=Microsoft.NETCore.App&framework_version=6.0.0&arch=x64&rid=linux-x64&os=nixos.24.11
Red Alert has encountered a fatal error.
Please refer to the crash logs and FAQ for more information.

Log files are located in /home/fusion809/.config/openra/Logs
The FAQ is available at https://wiki.openra.net/FAQ
4

maybe try

config = {
    allowUnfree = true;
    permittedInsecurePackages = [
        "dotnet-sdk-6.0.428"
    ];
};
5

Thank you for your suggestion. I tried adding that to overlays.nix, and also configuration.nix (I know, I may have gone overboard) and still I get that error of error: Package ‘dotnet-sdk-6.0.428’ in /nix/var/nix/profiles/per-user/root/channels/nixos/pkgs/development/compilers/dotnet/build-dotnet.nix:1 is marked as insecure, refusing to evaluate..

6

Let’s discuss on your nixos configs repo

7

Sure, go ahead. I am happy to resolve this wherever I can.

8

solved in openra overlay · Issue #1 · fusion809/NixOS-configs · GitHub

solution was

  nixpkgs.config = {
    allowUnfree = true;
    permittedInsecurePackages = [
      "dotnet-runtime-6.0.36"
      "dotnet-sdk-6.0.428"
    ];
  };