language-experiments/flake.nix at main · wonrax/language-experiments · GitHub

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{
  description = "Language experiments";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/release-25.05";
    flake-utils.url = "github:numtide/flake-utils";

    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs =
    {
      nixpkgs,
      rust-overlay,
      flake-utils,
      ...
    }:
    flake-utils.lib.eachDefaultSystem (
      system:
      let
        overlays = [
          (import rust-overlay)
        ];
        pkgs = import nixpkgs { inherit system overlays; };

        rustToolchain = pkgs.rust-bin.stable.latest.default.override {
          extensions = [
            "rust-src"
            "clippy"
            "rust-analyzer"
          ];
        };
      in
      {
        devShells.default =
          with pkgs;
          mkShell {
            buildInputs = [
              rustToolchain

              # Haskell
              haskell.compiler.ghc98
              (haskell-language-server.override { supportedGhcVersions = [ "98" ]; })
              cabal-install
            ];

            RUST_SRC_PATH = "${rustToolchain}/lib/rustlib/src/rust/library";
          };
      }
    );
}