diff --git a/flake.nix b/flake.nix
index 9d9d6ee..63c37dd 100644
--- a/flake.nix
+++ b/flake.nix
@@ -21,12 +21,9 @@
         pkgs = import nixpkgs {
           inherit system overlays;
         };
-        rust = pkgs.rust-bin.selectLatestNightlyWith (
-          toolchain:
-          toolchain.default.override {
-            extensions = [ "rust-analyzer" ];
-          }
-        );
+        rust = pkgs.rust-bin.stable.latest.default.override {
+          extensions = [ "rust-analyzer" ];
+        };
       in
       {
         devShells.default = pkgs.mkShell rec {
diff --git a/rustfmt.toml b/rustfmt.toml
deleted file mode 100644
index 3a3f3f1..0000000
--- a/rustfmt.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-imports_granularity = "Module"
-group_imports = "StdExternalCrate"