fix: rust-analyzer

flake.lock

@@ -69,6 +69,21 @@
         "type": "github"
       }
     },
+    "flake-utils_3": {
+      "locked": {
+        "lastModified": 1659877975,
+        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1669809720,
@@ -85,11 +100,28 @@
         "type": "github"
       }
     },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1665296151,
+        "narHash": "sha256-uOB0oxqxN9K7XGF1hcnY+PQnlQJ+3bP2vCn/+Ru/bbc=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "14ccaaedd95a488dd7ae142757884d8e125b3363",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "crane": "crane",
         "flake-utils": "flake-utils_2",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay_2"
       }
     },
     "rust-overlay": {
@@ -116,6 +148,25 @@
         "repo": "rust-overlay",
         "type": "github"
       }
+    },
+    "rust-overlay_2": {
+      "inputs": {
+        "flake-utils": "flake-utils_3",
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1670380307,
+        "narHash": "sha256-7fJN5ndnE8YbrrtYdqMo3gDV/BW37M4wNBRhjdfP/XY=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "fc98242f5f49d39b8fd3a611c146741a35dc012d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
     }
   },
   "root": "root",

flake.nix

@@ -3,14 +3,16 @@
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
     crane.url = "github:ipetkov/crane";
     crane.inputs.nixpkgs.follows = "nixpkgs";
+    rust-overlay.url = "github:oxalica/rust-overlay";
     flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, crane, flake-utils }:
+  outputs = { self, nixpkgs, crane, rust-overlay, flake-utils }:
     flake-utils.lib.eachDefaultSystem (system:
       let
+        overlays = [ (import rust-overlay) ];
         pkgs = import nixpkgs {
-          system = system;
+          inherit system overlays;
         };
         inherit (pkgs) lib;
 
@@ -20,6 +22,7 @@
 
         buildInputs = [
           pkgs.bintools
+          rust-toolchain
         ] ++ lib.optionals pkgs.stdenv.isDarwin [
           # Additional darwin specific inputs can be set here
           pkgs.libiconv
@@ -34,6 +37,11 @@
         aoc-2022 = craneLib.buildPackage {
           inherit cargoArtifacts src buildInputs;
         };
+
+        rust-toolchain = pkgs.rust-bin.stable.latest.default;
+        rust-dev-toolchain = pkgs.rust-bin.stable.latest.default.override {
+          extensions = [ "rust-src" "rust-analyzer" ];
+        };
       in
     {
       checks = {
@@ -68,10 +76,7 @@
 
         # Extra inputs can be added here
         nativeBuildInputs = with pkgs; [
-          cargo
-          cargo-expand
-          rustc
-          rustfmt
+          rust-dev-toolchain
           bintools
         ];
       };