{
  pkgs,
  pkgs-unstable,
  ...
}: {
  environment.systemPackages = with pkgs; [
    # Ensure latest stable Rider version (not necessarily stable on NixOS)
    pkgs-unstable.jetbrains.rider

    # .NET
    dotnetCorePackages.dotnet_9.sdk
    dotnetCorePackages.dotnet_9.aspnetcore
    dotnetCorePackages.dotnet_9.runtime

    # Mono
    mono
    # NOTE: nixpkgs-unstable uses .NET8 SDK
    # WARNING: nixpkgs-25.05 uses .NET6 SDK (now marked insecure)
    pkgs-unstable.msbuild

    # .NET Framework Tools/Services
    omnisharp-roslyn
    netcoredbg
  ];

  programs.nix-ld = {
    enable = true;
    libraries = with pkgs; [
      icu
    ];
  };
}