From 4ed47982cf10f2d7209be9361fdeeaa6007f51e6 Mon Sep 17 00:00:00 2001
From: ada <ada@cubething.dev>
Date: Thu, 17 Sep 2026 17:07:01 -0500
Subject: [PATCH] Minimize packaged Rust toolchain

---
 flake.nix | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/flake.nix b/flake.nix
index 5a2fdcf6..ba3865f9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -26,16 +26,24 @@
 
         buildInputs = with pkgs; [ openssl ];
 
-        toolchain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
+        toolchainConfig = (builtins.fromTOML (builtins.readFile ./rust-toolchain.toml)).toolchain;
+        packageToolchain = pkgs.rust-bin.fromRustupToolchain (
+          toolchainConfig
+          // {
+            profile = "minimal";
+            components = [ "rustc-dev" ];
+          }
+        );
 
         rustPlatform = pkgs.makeRustPlatform {
-          cargo = toolchain;
-          rustc = toolchain;
+          cargo = packageToolchain;
+          rustc = packageToolchain;
         };
       in
       {
         packages = {
           default = self.outputs.packages.${system}.bevy;
+          rustToolchain = packageToolchain;
           bevy = rustPlatform.buildRustPackage {
             pname = "bevy";
             version = "0.1.0-dev";
@@ -47,11 +55,15 @@
             nativeBuildInputs = nativeBuildInputs ++ (with pkgs; [ makeBinaryWrapper ]);
             postInstall = ''
               for bin in $out/bin/bevy{,_lint}; do
-                wrapProgram $bin --set BEVY_LINT_SYSROOT ${toolchain}
+                wrapProgram $bin --set BEVY_LINT_SYSROOT ${packageToolchain}
               done
             '';
 
             inherit buildInputs;
+            passthru = {
+              inherit packageToolchain;
+              rustToolchainChannel = toolchainConfig.channel;
+            };
           };
         };