add in default nix at repo root that calls flake for build

default.nix

@@ -0,0 +1,10 @@
+(import
+  (
+    let lock = builtins.fromJSON (builtins.readFile ./flake.lock); in
+    fetchTarball {
+      url = lock.nodes.flake-compat.locked.url or "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
+      sha256 = lock.nodes.flake-compat.locked.narHash;
+    }
+  )
+  { src = ./.; }
+).defaultNix

flake.lock

@@ -1,5 +1,19 @@
 {
   "nodes": {
+    "flake-compat": {
+      "locked": {
+        "lastModified": 1696426674,
+        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "revCount": 57,
+        "type": "tarball",
+        "url": "https://api.flakehub.com/f/pinned/edolstra/flake-compat/1.0.1/018afb31-abd1-7bff-a5e4-cff7e18efb7a/source.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://flakehub.com/f/edolstra/flake-compat/1.tar.gz"
+      }
+    },
     "flake-utils": {
       "inputs": {
         "systems": "systems"
@@ -59,6 +73,7 @@
     },
     "root": {
       "inputs": {
+        "flake-compat": "flake-compat",
         "flake-utils": "flake-utils",
         "nixgl": "nixgl",
         "nixpkgs": "nixpkgs",

flake.nix

@@ -18,9 +18,12 @@
       inputs.nixpkgs.follows = "nixpkgs";
       inputs.flake-utils.follows = "flake-utils";
     };
+
+    # for non flake backwards compatibility 
+    flake-compat.url = "https://flakehub.com/f/edolstra/flake-compat/1.tar.gz";
   };
 
-  outputs = { self, nixpkgs, rust-overlay, flake-utils, nixgl }:
+  outputs = { self, nixpkgs, rust-overlay, flake-utils, nixgl, ... }@inputs:
     let supportedSystems = [ "x86_64-linux" "x86_64-darwin" "aarch64-darwin" "aarch64-linux" ];
     in flake-utils.lib.eachSystem supportedSystems (system:
       let
@@ -31,7 +34,8 @@
         rocBuild = import ./nix { inherit pkgs; };
 
         compile-deps = rocBuild.compile-deps;
-        inherit (compile-deps) zigPkg llvmPkgs llvmVersion llvmMajorMinorStr glibcPath libGccSPath;
+        inherit (compile-deps) zigPkg llvmPkgs llvmVersion 
+            llvmMajorMinorStr glibcPath libGccSPath darwinInputs;
 
         # DevInputs are not necessary to build roc as a user 
         linuxDevInputs = with pkgs;
@@ -48,16 +52,6 @@
             xorg.libxcb
           ];
 
-        darwinInputs = with pkgs;
-          lib.optionals stdenv.isDarwin
-            (with pkgs.darwin.apple_sdk.frameworks; [
-              AppKit
-              CoreFoundation
-              CoreServices
-              Foundation
-              Security
-            ]);
-
         # DevInputs are not necessary to build roc as a user 
         darwinDevInputs = with pkgs;
           lib.optionals stdenv.isDarwin

nix/compile-deps.nix

@@ -12,4 +12,14 @@ let
 in
 {
   inherit zigPkg llvmPkgs llvmVersion llvmMajorMinorStr glibcPath libGccSPath;
+
+  darwinInputs = with pkgs;
+    lib.optionals stdenv.isDarwin
+      (with pkgs.darwin.apple_sdk.frameworks; [
+        AppKit
+        CoreFoundation
+        CoreServices
+        Foundation
+        Security
+      ]);
 }

nix/default.nix

@@ -5,11 +5,12 @@ let
     cargo = rustVersion;
     rustc = rustVersion;
   };
-  compile-deps = pkgs.callPackage ./compile-deps.nix {};
+  compile-deps = pkgs.callPackage ./compile-deps.nix { };
 in
 {
   inherit rustPlatform compile-deps;
   rust-shell =
     (rustVersion.override { extensions = [ "rust-src" "rust-analyzer" ]; });
   roc-cli = pkgs.callPackage ./roc-cli.nix { inherit compile-deps rustPlatform; };
+  roc-lang-server = {};
 }

nix/roc-cli.nix

@@ -1,4 +1,4 @@
-{ pkgs, rustPlatform, compile-deps }:
+{ pkgs, rustPlatform, compile-deps, subPackage ? null }:
 let
   inherit (compile-deps) zigPkg llvmPkgs llvmVersion llvmMajorMinorStr glibcPath libGccSPath;
 in
@@ -6,10 +6,12 @@ rustPlatform.buildRustPackage {
   pname = "roc";
   version = "0.0.1";
 
-  src = pkgs.nix-gitignore.gitignoreSource [ ] ./.;
+  buildAndTestSubdir = subPackage;
+
+  src = pkgs.nix-gitignore.gitignoreSource [ ] ../.;
 
   cargoLock = {
-    lockFile = ./Cargo.lock;
+    lockFile = ../Cargo.lock;
     outputHashes = {
       "criterion-0.3.5" = "sha256-+FibPQGiR45g28xCHcM0pMN+C+Q8gO8206Wb5fiTy+k=";
       "inkwell-0.2.0" = "sha256-VhTapYGonoSQ4hnDoLl4AAgj0BppAhPNA+UPuAJSuAU=";