diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
new file mode 100644
index 000000000000..0db166fcbbbe
--- /dev/null
+++ b/.github/workflows/nix.yml
@@ -0,0 +1,41 @@
+name: nix
+
+on:
+  schedule:
+    # Run weekly
+    - cron: "0 0 * * SUN"
+  workflow_dispatch:
+    # Needed so we can run it manually
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  # Opens a PR with an updated flake.lock file
+  update:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: cachix/install-nix-action@v30
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/update-flake-lock@main
+        with:
+          pr-title: "Update flake.lock"
+          pr-labels: |
+            L-ignore
+            A-dependencies
+
+  build:
+    strategy:
+      matrix:
+        runs-on: [ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.runs-on }}
+    steps:
+      - uses: cachix/install-nix-action@v30
+      - uses: actions/checkout@v4
+
+      - name: Activate nix env
+        run: nix develop -c echo Ok
+
+      - name: Check that we can compile all crates
+        run: nix develop -c cargo check --all-targets
diff --git a/flake.lock b/flake.lock
index 45ed6bb432ff..35fa2913ff88 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,30 +1,33 @@
 {
   "nodes": {
-    "flake-utils": {
+    "fenix": {
       "inputs": {
-        "systems": "systems"
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "rust-analyzer-src": "rust-analyzer-src"
       },
       "locked": {
-        "lastModified": 1710146030,
-        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "lastModified": 1746772806,
+        "narHash": "sha256-5/Nq62wjkZrOhUULTFjgi4Dsc7T8kIluUPkoLsyAeUA=",
+        "owner": "nix-community",
+        "repo": "fenix",
+        "rev": "505bf684711e964c8f84d4c804e38f62b24accec",
         "type": "github"
       },
       "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
+        "owner": "nix-community",
+        "repo": "fenix",
         "type": "github"
       }
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1719468428,
-        "narHash": "sha256-vN5xJAZ4UGREEglh3lfbbkIj+MPEYMuqewMn4atZFaQ=",
+        "lastModified": 1746576598,
+        "narHash": "sha256-FshoQvr6Aor5SnORVvh/ZdJ1Sa2U4ZrIMwKBX5k2wu0=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "1e3deb3d8a86a870d925760db1a5adecc64d329d",
+        "rev": "b3582c75c7f21ce0b429898980eddbbf05c68e55",
         "type": "github"
       },
       "original": {
@@ -36,80 +39,24 @@
     },
     "root": {
       "inputs": {
-        "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs",
-        "rust-overlay": "rust-overlay",
-        "solc": "solc"
-      }
-    },
-    "rust-overlay": {
-      "inputs": {
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1719714047,
-        "narHash": "sha256-MeNPopLLv63EZj5L43j4TZkmW4wj1ouoc/h/E20sl/U=",
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "rev": "cb216719ce89a43dfb3d1b86a9575e89f4b727a4",
-        "type": "github"
-      },
-      "original": {
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "type": "github"
-      }
-    },
-    "solc": {
-      "inputs": {
-        "flake-utils": [
-          "flake-utils"
-        ],
-        "nixpkgs": [
-          "nixpkgs"
-        ],
-        "solc-macos-amd64-list-json": "solc-macos-amd64-list-json"
-      },
-      "locked": {
-        "lastModified": 1717442267,
-        "narHash": "sha256-6TnQvA6Q/xC3r1M+wGC5gnDc/5XfOPjC8X6LlGDWDNc=",
-        "owner": "hellwolf",
-        "repo": "solc.nix",
-        "rev": "2ac2862f224aa0d67cbc6b3246392489f8a50596",
-        "type": "github"
-      },
-      "original": {
-        "owner": "hellwolf",
-        "repo": "solc.nix",
-        "type": "github"
+        "fenix": "fenix",
+        "nixpkgs": "nixpkgs"
       }
     },
-    "solc-macos-amd64-list-json": {
+    "rust-analyzer-src": {
       "flake": false,
       "locked": {
-        "narHash": "sha256-Prwz95BgMHcWd72VwVbcH17LsV9f24K2QMcUiWUQZzI=",
-        "type": "file",
-        "url": "https://github.com/ethereum/solc-bin/raw/f743ca7/macosx-amd64/list.json"
-      },
-      "original": {
-        "type": "file",
-        "url": "https://github.com/ethereum/solc-bin/raw/f743ca7/macosx-amd64/list.json"
-      }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "lastModified": 1746722075,
+        "narHash": "sha256-t4ZntWiW4C3lE621lV3XyK3KltC5/SW1V9G+CSz70rQ=",
+        "owner": "rust-lang",
+        "repo": "rust-analyzer",
+        "rev": "8b624868e4ce2cb5b39559175f0978bee86bdeea",
         "type": "github"
       },
       "original": {
-        "owner": "nix-systems",
-        "repo": "default",
+        "owner": "rust-lang",
+        "ref": "nightly",
+        "repo": "rust-analyzer",
         "type": "github"
       }
     }
diff --git a/flake.nix b/flake.nix
index ff783b4956e4..8cf41ed16d3a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,52 +1,45 @@
 {
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
-    flake-utils.url = "github:numtide/flake-utils";
-    rust-overlay = {
-      url = "github:oxalica/rust-overlay";
-      inputs = {
-        nixpkgs.follows = "nixpkgs";
-      };
-    };
-    solc = {
-      url = "github:hellwolf/solc.nix";
-      inputs = {
-        nixpkgs.follows = "nixpkgs";
-        flake-utils.follows = "flake-utils";
-      };
+    fenix = {
+      url = "github:nix-community/fenix";
+      inputs.nixpkgs.follows = "nixpkgs";
     };
   };
 
-  outputs = { self, nixpkgs, rust-overlay, flake-utils, solc }:
-    flake-utils.lib.eachDefaultSystem (system:
-      let
-        pkgs = import nixpkgs {
-          inherit system;
-          overlays = [ rust-overlay.overlays.default solc.overlay ];
-        };
-        lib = pkgs.lib;
-        toolchain = pkgs.rust-bin.stable.latest.default.override {
-          extensions = [ "rustfmt" "clippy" "rust-src" ];
-        };
-      in
-      {
-        devShells.default = pkgs.mkShell {
-          nativeBuildInputs = with pkgs; [
-            pkg-config
-            solc_0_8_23
-            (solc.mkDefault pkgs solc_0_8_23)
-            toolchain
-          ];
-          buildInputs = lib.optionals pkgs.stdenv.isDarwin [
-            pkgs.darwin.apple_sdk.frameworks.AppKit
-          ];
-          packages = with pkgs; [
-            rust-analyzer-unwrapped
-          ];
+  outputs = { self, nixpkgs, fenix }:
+    let eachSystem = nixpkgs.lib.genAttrs nixpkgs.lib.systems.flakeExposed;
+    in {
+      devShells = eachSystem (system:
+        let
+          pkgs = import nixpkgs {
+            inherit system;
+            overlays = [ fenix.overlays.default ];
+          };
+
+          lib = pkgs.lib;
+          toolchain = fenix.packages.${system}.stable.toolchain;
+        in {
+          default = pkgs.mkShell {
+            nativeBuildInputs = with pkgs; [
+              pkg-config
+              toolchain
+
+              # test dependencies
+              solc
+              vyper
+              nodejs
+            ];
+            buildInputs = lib.optionals pkgs.stdenv.isDarwin
+              [ pkgs.darwin.apple_sdk.frameworks.AppKit ];
 
-          # Environment variables
-          RUST_SRC_PATH = "${toolchain}/lib/rustlib/src/rust/library";
-          LD_LIBRARY_PATH = lib.makeLibraryPath [ pkgs.libusb1 ];
-        };
-      });
+            packages = with pkgs; [ rust-analyzer-unwrapped ];
+
+            # Environment variables
+            RUST_SRC_PATH = "${toolchain}/lib/rustlib/src/rust/library";
+            LD_LIBRARY_PATH = lib.makeLibraryPath [ pkgs.libusb1 ];
+            CFLAGS = "-DJEMALLOC_STRERROR_R_RETURNS_CHAR_WITH_GNU_SOURCE";
+          };
+        });
+    };
 }