chore: add devbox nix-flake for customising stack, ghc, and more

Author: seanstrom

nix/devbox/flake.lock

@@ -0,0 +1,41 @@
+{
+  description = "Stack and GHC for Devbox";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-24.11";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+  let
+  in
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs {
+          system = system;
+        };
+
+        stack-wrapped = pkgs.symlinkJoin {
+          name = "stack";
+          paths = [ pkgs.stack ];
+          buildInputs = [ pkgs.makeWrapper ];
+          postBuild = ''
+            wrapProgram $out/bin/stack \
+              --add-flags "\
+                --no-nix \
+                --system-ghc \
+                --no-install-ghc \
+              "
+          '';
+        };
+      in 
+      {
+        packages.stack = stack-wrapped;
+        packages.ghc = pkgs.haskell.compiler.ghc928;
+        packages.cc = pkgs.stdenv.cc;
+        packages.hls = pkgs.haskell.packages.ghc928.haskell-language-server;
+        packages.apple_sdk_CoreServices = pkgs.darwin.apple_sdk.frameworks.CoreServices;
+        packages.apple_sdk_CoreFoundation = pkgs.darwin.apple_sdk.frameworks.CoreFoundation;
+        packages.apple_sdk_Cocoa = pkgs.darwin.apple_sdk.frameworks.Cocoa;
+      });
+}