diff --git a/default.nix b/default.nix
index c8189c0..5ba8b8f 100644
--- a/default.nix
+++ b/default.nix
@@ -1,38 +1,5 @@
-let
-  pkgs = import <nixpkgs> { };
-in
-
-self: super: rec {
-  python39 = super.python39.override {
-    packageOverrides = python-self: python-super: {
-      strawberry_graphql = python-super.buildPythonPackage rec {
-        pname = "strawberry-graphql";
-        version = "0.123.0";
-        format = "pyproject";
-        patches = [
-          ./strawberry-graphql.patch
-        ];
-        propagatedBuildInputs = with self.python39Packages; [
-          typing-extensions
-          graphql-core
-          python-multipart
-          python-dateutil
-          flask
-          pydantic
-          pygments
-          poetry
-        ];
-        src = python-super.fetchPypi {
-          inherit pname version;
-          sha256 = "sha256-KsmZ5Xv8tUg6yBxieAEtvoKoRG60VS+iVGV0X6oCExo=";
-        };
-      };
-    };
-  };
-  pythonPackages = python39.pkgs;
-  selfprivacy-api = super.callPackage ./pkgs/selfprivacy-api {};
-  selfprivacy-graphql-api = super.callPackage ./pkgs/selfprivacy-graphql-api {
-    nixpkgs = pkgs;
-    pythonPkgs = pythonPackages;
+_final: prev: {
+  selfprivacy-graphql-api = prev.callPackage ./pkgs/selfprivacy-graphql-api {
+    pythonPackages = prev.python310Packages;
   };
 }
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..e1f1afc
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,11 @@
+{
+  description = "Selfprivacy overlay";
+
+  outputs = { ... }: {
+    overlay = _final: prev: {
+      selfprivacy-graphql-api = prev.callPackage ./pkgs/selfprivacy-graphql-api {
+        pythonPackages = prev.python310Packages;
+      };
+    };
+  };
+}
diff --git a/pkgs/selfprivacy-graphql-api/default.nix b/pkgs/selfprivacy-graphql-api/default.nix
index 63ba638..a9c8589 100644
--- a/pkgs/selfprivacy-graphql-api/default.nix
+++ b/pkgs/selfprivacy-graphql-api/default.nix
@@ -1,61 +1,37 @@
-{ nixpkgs ? import <nixpkgs> { }, pythonPkgs ? nixpkgs.pkgs.python39Packages }:
+{ pythonPackages }:
 
-let
-  inherit (nixpkgs) pkgs;
-  inherit pythonPkgs;
-
-  selfprivacy-graphql-api =
-    { buildPythonPackage
-    , fetchPypi
-    , setuptools
-    , portalocker
-    , pytz
-    , pytest
-    , pytest-mock
-    , pytest-datadir
-    , huey
-    , gevent
-    , mnemonic
-    , pydantic
-    , typing-extensions
-    , strawberry_graphql
-    , psutil
-    , fastapi
-    , uvicorn
-    }:
-    pythonPkgs.buildPythonApplication rec {
-      pname = "selfprivacy-graphql-api";
-      version = "2.0.9";
-      src = builtins.fetchGit {
-        url = "https://git.selfprivacy.org/SelfPrivacy/selfprivacy-rest-api.git";
-        rev = "0a09a338b850704f221bd9b451519290584ef209";
-      };
-      propagatedBuildInputs = [
-        setuptools
-        portalocker
-        pytz
-        pytest
-        pytest-mock
-        pytest-datadir
-        huey
-        gevent
-        mnemonic
-        pydantic
-        typing-extensions
-        strawberry_graphql
-        psutil
-        fastapi
-        uvicorn
-      ];
-      meta = {
-        description = ''
-          SelfPrivacy Server Management API
-        '';
-      };
-      passthru = {
-        pythonPath = pythonPkgs.makePythonPath propagatedBuildInputs;
-      };
-    };
-  drv = pythonPkgs.callPackage selfprivacy-graphql-api { };
-in
-drv
+pythonPackages.buildPythonApplication rec {
+  pname = "selfprivacy-graphql-api";
+  version = "2.1.3"; # (version updates here are susceptible to human error)
+  src = builtins.fetchGit {
+    url = "https://git.selfprivacy.org/SelfPrivacy/selfprivacy-rest-api.git";
+    rev = "b3a37e8b1fd50457b4d48b9421d77603437e6f2f";
+  };
+  propagatedBuildInputs = with pythonPackages; [
+    fastapi
+    gevent
+    huey
+    mnemonic
+    portalocker
+    psutil
+    pydantic
+    pytest
+    pytest-datadir
+    pytest-mock
+    pytz
+    redis
+    setuptools
+    strawberry-graphql
+    typing-extensions
+    uvicorn
+  ];
+  meta = {
+    description = ''
+      SelfPrivacy Server Management API
+    '';
+  };
+  passthru = {
+    # TODO explain what's the purpose of this?
+    pythonPath = pythonPackages.makePythonPath propagatedBuildInputs;
+  };
+}