From ba16d89956a05e9237919803ea25e51445c62fb6 Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Mon, 2 Nov 2026 21:57:36 -0500
Subject: [PATCH] Add rust-src to nix develop for LSP support.

---
 flake.nix | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/flake.nix b/flake.nix
index 3745050..693079a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -35,9 +35,10 @@
           pkgs = import nixpkgs {
             inherit system overlays;
           };
-          rustToolchain = (pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml).override {
+          rustToolchain = (pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml).override (old: {
             targets = [ "wasm32-unknown-unknown" ];
-          };
+            extensions = old.extensions ++ [ "rust-src" ]; # Add rust-src for LSP.
+          });
         in
         {
           default = pkgs.mkShell {