diff --git a/flake.nix b/flake.nix
index 4ed704a..1655a27 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,7 +2,7 @@
   description = "basic rust flake";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
     nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
     rust-overlay = {
       url = "github:oxalica/rust-overlay";
@@ -18,33 +18,40 @@
     };
   };
 
-  outputs = { self, nixpkgs, nixpkgs-unstable, flake-utils, gitignoresrc
-    , rust-overlay, ... }@inputs:
+  outputs = {
+    self,
+    nixpkgs,
+    nixpkgs-unstable,
+    flake-utils,
+    gitignoresrc,
+    rust-overlay,
+    ...
+  } @ inputs:
     {
       #overlay = import ./nix { inherit gitignoresrc; };
-    } // (flake-utils.lib.eachDefaultSystem (system:
-      let
-        unstable = import nixpkgs-unstable { inherit system; };
-        pkgs = import nixpkgs {
-          inherit system;
-          overlays = [ (import rust-overlay) ];
-        };
-      in rec {
-        devShell = pkgs.mkShell {
-          RUST_LOG = "debug";
-          RUST_BACKTRACE = 1;
-          buildInputs = [
-            pkgs.rust-bin.stable.latest.rustfmt
-            pkgs.rust-bin.stable.latest.default
-            pkgs.rust-analyzer
-            pkgs.cargo-audit
-            pkgs.cargo-license
-            pkgs.cargo-tarpaulin
-            pkgs.cargo-kcov
-            pkgs.valgrind
-            pkgs.gnuplot
-            pkgs.kcov
-          ];
-        };
-      }));
+    }
+    // (flake-utils.lib.eachDefaultSystem (system: let
+      unstable = import nixpkgs-unstable {inherit system;};
+      pkgs = import nixpkgs {
+        inherit system;
+        overlays = [(import rust-overlay)];
+      };
+    in rec {
+      devShell = pkgs.mkShell {
+        RUST_LOG = "debug";
+        RUST_BACKTRACE = 1;
+        buildInputs = [
+          pkgs.rust-bin.stable.latest.rustfmt
+          pkgs.rust-bin.stable.latest.default
+          pkgs.rust-analyzer
+          pkgs.cargo-audit
+          pkgs.cargo-license
+          pkgs.cargo-tarpaulin
+          pkgs.cargo-kcov
+          pkgs.valgrind
+          pkgs.gnuplot
+          pkgs.kcov
+        ];
+      };
+    }));
 }