fun with flakes

flake.nix

@@ -0,0 +1,46 @@
+{
+  description = "devshell-dawn";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
+    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    nixpkgs-unstable,
+    ...
+  }: let
+    system = "x86_64-linux";
+
+    pkgs = import nixpkgs {
+      inherit system;
+    };
+    pkgs-unstable = import nixpkgs-unstable {
+      inherit system;
+    };
+  in {
+    devShells."${system}".default = pkgs.mkShell {
+      packages = with pkgs; [
+        gnumake
+        bear
+        gcc
+      ];
+
+      shell = "${pkgs.bash}/bin/bash";
+    };
+
+    packages."${system}" = rec {
+      default = dawn;
+      dawn = pkgs.haskellPackages.developPackage {
+        root = ./.;
+        modifier = drv:
+          pkgs.haskell.lib.addBuildTools drv (with pkgs.haskellPackages; [
+            cabal-install
+            ghcid
+          ]);
+      };
+    };
+  };
+}