diff --git a/flake.lock b/flake.lock
index e9a72b901..75786d1f8 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,5 +1,26 @@
 {
   "nodes": {
+    "fenix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "rust-analyzer-src": "rust-analyzer-src"
+      },
+      "locked": {
+        "lastModified": 1721111394,
+        "narHash": "sha256-hCN0NCmqPdosiyGt2thVRqg9ltctTROzGAoMq57QXPs=",
+        "owner": "nix-community",
+        "repo": "fenix",
+        "rev": "e63599e3186cfb3284933bc815d33a509addd00e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "fenix",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1720910238,
@@ -17,8 +38,26 @@
     },
     "root": {
       "inputs": {
+        "fenix": "fenix",
         "nixpkgs": "nixpkgs"
       }
+    },
+    "rust-analyzer-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1721048109,
+        "narHash": "sha256-X3tDuTPGKrAzTeQ9mkaGZL6srpsVEbZGW9PVdOLgfJo=",
+        "owner": "rust-lang",
+        "repo": "rust-analyzer",
+        "rev": "0c95aaa08e5f870d269f0ca13010eda9a4dc3402",
+        "type": "github"
+      },
+      "original": {
+        "owner": "rust-lang",
+        "ref": "nightly",
+        "repo": "rust-analyzer",
+        "type": "github"
+      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index 7b989766e..f3bdf78ab 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,14 +3,21 @@
     nixpkgs = {
       url = "github:nixos/nixpkgs";
     };
+    fenix = {
+      url = "github:nix-community/fenix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
-  outputs = {nixpkgs, ...}: let
+
+  outputs = { nixpkgs, fenix, ... }: let
     systems = ["x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin"];
     forAllSystems = nixpkgs.lib.genAttrs systems;
   in {
     devShells = forAllSystems (
       system: let
         pkgs = nixpkgs.legacyPackages.${system};
+        rustStable = fenix.packages.${system}.stable.toolchain;
+        wasmTarget = fenix.packages.${system}.targets.wasm32-wasi.latest.rust-std;
       in {
         default = with pkgs;
           mkShell {
@@ -18,12 +25,11 @@
               clang
               libiconv
               sqlite
-              rustup
               gnumake
+              rustup # not used to install the toolchain, but the makefile uses it
+              rustStable
+              wasmTarget
             ];
-            shellHook = ''
-              rustup default stable
-            '';
           };
       }
     );