diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..7f2ff4a
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1701680307,
+        "narHash": "sha256-kAuep2h5ajznlPMD9rnQyffWG8EM/C73lejGofXvdM8=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "4022d587cbbfd70fe950c1e2083a02621806a725",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1701539137,
+        "narHash": "sha256-nVO/5QYpf1GwjvtpXhyxx5M3U/WN0MwBro4Lsk+9mL0=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "933d7dc155096e7575d207be6fb7792bc9f34f6d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-23.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
index c631529..753d03f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,7 +1,6 @@
 {
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
-    nixpkgs_stable.url = "github:NixOS/nixpkgs/nixpkgs-23.05-darwin";
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-23.11";
     flake-utils.url = "github:numtide/flake-utils";
   };
   outputs = { nixpkgs, flake-utils, ... }: flake-utils.lib.eachDefaultSystem (system:
@@ -10,19 +9,29 @@
         inherit system;
       };
 
-      pypkgs = ps: [
-        ps.pip
-        ps.scipy
-        ps.numpy
-        ps.matplotlib
-      ];
-
     in rec {
       devShell = pkgs.mkShell {
         name = "WRPLL-sim";
-        buildInputs = with pkgs; [
-          (python3.withPackages pypkgs)
+        venvDir = "./.venv";
+        buildInputs = with pkgs.python3Packages; [
+          python
+          numba
+          numpy
+          notebook # use jupyter notebook without missing libstdc++.so.6
+          venvShellHook
         ];
+
+        # Only run once when venv is created
+        postVenvCreation = ''
+          unset SOURCE_DATE_EPOCH
+          pip install -r requirements.txt
+        '';
+
+        postShellHook = ''
+          # allow pip to install wheels
+          unset SOURCE_DATE_EPOCH
+        '';
+
       };
     }
   );
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..04419a6
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,11 @@
+scipy
+numpy
+ipykernel
+ipywidgets
+jupyter
+jupyterlab
+notebook
+numba
+pandas
+plotly
+plotly-resampler
\ No newline at end of file