revert cahix build, and nix config

Author: CppCXY

.github/workflows/upload_cachix.yml

@@ -14,6 +14,7 @@ jobs:
       matrix:
         nixChannel:
           - nixos-25.05
+          - nixos-24.11 # remove this when 25.05 is out of beta
           - nixos-unstable
           - nixpkgs-unstable
 

flake.nix

@@ -23,9 +23,6 @@
       let
         overlays = [ rust-overlay.overlays.default ];
         pkgs = import nixpkgs { inherit system overlays; };
-        rustToolchain = pkgs.rust-bin.stable."1.85.0".default.override {
-          extensions = [ "rust-src" "clippy" "rustfmt" ];
-        };
       in
       {
         packages =
@@ -38,10 +35,11 @@
           };
 
         devShells.default = pkgs.mkShell {
-          buildInputs = [
-            rustToolchain
-            pkgs.rust-analyzer
-          ]
+          buildInputs = (with pkgs; [
+            rust-analyzer
+            clippy
+            rustfmt
+          ])
           ++ self.packages.${system}.default.buildInputs
           ++ self.packages.${system}.default.nativeBuildInputs;
         };

nix/packages.nix

@@ -7,19 +7,11 @@ let
       rustPlatform,
       stdenv,
       pkg-config,
-      rust-bin,
     }:
     let
       cargoToml = builtins.fromTOML (builtins.readFile /${root}/crates/${x}/Cargo.toml);
-      rustToolchain = rust-bin.stable."1.85.0".default.override {
-        extensions = [ "rust-src" "clippy" "rustfmt" ];
-      };
-      rustPlatformWithToolchain = rustPlatform.override {
-        rustc = rustToolchain;
-        cargo = rustToolchain;
-      };
     in
-    rustPlatformWithToolchain.buildRustPackage {
+    rustPlatform.buildRustPackage {
       pname = cargoToml.package.name;
       version = cargoToml.package.version;