all: add rust-src to rust-toolchain.toml

Author: fubhy

flake.lock

@@ -1,7 +1,10 @@
 {
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
-    rust.url = "github:oxalica/rust-overlay";
+    rust = {
+      url = "github:oxalica/rust-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
     foundry.url = "github:shazow/foundry.nix/stable";
     process-compose-flake.url = "github:Platonic-Systems/process-compose-flake";
     services-flake.url = "github:juspay/services-flake";
@@ -21,19 +24,18 @@
       perSystem = { config, self', inputs', pkgs, system, ... }:
         let
           overlays = [
-            (import rust)
-            (self: super: {
-              rust-toolchain = super.rust-bin.stable.latest.default;
-            })
+            rust.overlays.default
             foundry.overlay
           ];
 
-          pkgsWithOverlays = import nixpkgs { 
+          pkgs = import nixpkgs {
             inherit overlays system; 
           };
+
+          rust-toolchain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
         in {
-          devShells.default = pkgsWithOverlays.mkShell {
-            packages = (with pkgsWithOverlays; [
+          devShells.default = pkgs.mkShell {
+            packages = (with pkgs; [
               rust-toolchain
               foundry-bin
               solc
@@ -63,7 +65,7 @@
               initialDatabases = [
                 {
                   inherit name;
-                  schemas = [ (pkgsWithOverlays.writeText "init-${name}.sql" ''
+                  schemas = [ (pkgs.writeText "init-${name}.sql" ''
                     CREATE EXTENSION IF NOT EXISTS pg_trgm;
                     CREATE EXTENSION IF NOT EXISTS btree_gist; 
                     CREATE EXTENSION IF NOT EXISTS postgres_fdw;
@@ -146,7 +148,7 @@
 
               services.anvil."anvil-integration" = {
                 enable = true;
-                package = pkgsWithOverlays.foundry-bin;
+                package = pkgs.foundry-bin;
                 port = 3021;
                 timestamp = 1743944919;
               };

flake.nix

@@ -1,4 +1,4 @@
 [toolchain]
 channel = "stable"
 profile = "default"
-components = [ "rustfmt" ]
+components = [ "rustfmt", "rust-src" ]