diff --git a/pkgs/development/python-modules/foolscap/default.nix b/pkgs/development/python-modules/foolscap/default.nix
index 771feb3215fe..2da82762195b 100644
--- a/pkgs/development/python-modules/foolscap/default.nix
+++ b/pkgs/development/python-modules/foolscap/default.nix
@@ -1,46 +1,45 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, fetchpatch
 , mock
 , pyopenssl
 , pytestCheckHook
+, pythonOlder
 , service-identity
+, six
 , twisted
+, txi2p-tahoe
+, txtorcon
 }:
 
 buildPythonPackage rec {
   pname = "foolscap";
-  version = "21.7.0";
+  version = "23.3.0";
+
+  disabled = pythonOlder "3.7";
+
+  format = "setuptools";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "sha256-6dGFU4YNk1joXXZi2c2L84JtUbTs1ICgXfv0/EU2P4Q=";
+    hash = "sha256-Vu7oXC1brsgBwr2q59TAgx8j1AFRbi5mjRNIWZTbkUU=";
   };
 
-  patches = [
-    (fetchpatch {
-      name = "fix-tests-with-twisted-22.10.0.patch";
-      url = "https://github.com/warner/foolscap/commit/c04202eb5d4cf052e650ec2985ea6037605fd79e.patch";
-      hash = "sha256-RldDc18n3WYHdYg0ZmM8PBffIuiGa1NIfdoHs3mEEfc=";
-    })
-  ];
-
   propagatedBuildInputs = [
-    mock
+    six
     twisted
     pyopenssl
-    service-identity
-  ];
+  ] ++ twisted.optional-dependencies.tls;
+
+  passthru.optional-dependencies = {
+    i2p = [ txi2p-tahoe ];
+    tor = [ txtorcon ];
+  };
 
   nativeCheckInputs = [
+    mock
     pytestCheckHook
-  ];
-
-  disabledTestPaths = [
-    # Not all dependencies are present
-    "src/foolscap/test/test_connection.py"
-  ];
+  ] ++ lib.flatten (lib.attrValues passthru.optional-dependencies);
 
   pythonImportsCheck = [ "foolscap" ];
 
diff --git a/pkgs/development/python-modules/txi2p-tahoe/default.nix b/pkgs/development/python-modules/txi2p-tahoe/default.nix
new file mode 100644
index 000000000000..3d891c6eeed1
--- /dev/null
+++ b/pkgs/development/python-modules/txi2p-tahoe/default.nix
@@ -0,0 +1,50 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, setuptools
+, setuptools-scm
+, parsley
+, twisted
+, python
+}:
+
+buildPythonPackage rec {
+  pname = "txi2p-tahoe";
+  version = "0.3.7";
+
+  format = "pyproject";
+
+  src = fetchFromGitHub {
+    owner = "tahoe-lafs";
+    repo = "txi2p";
+    rev = "refs/tags/${version}";
+    hash = "sha256-u/IOhxK9jWC/tTKKLsc4PexbCuki+yEtMNw7LuQKmuk=";
+  };
+
+  nativeBuildInputs = [
+    setuptools
+    setuptools-scm
+  ];
+
+  SETUPTOOLS_SCM_PRETEND_VERSION = version;
+
+  propagatedBuildInputs = [
+    parsley
+    twisted
+  ];
+
+  pythonImportsCheck = [ "txi2p" ];
+
+  checkPhase = ''
+    runHook preCheck
+    ${python.interpreter} -m twisted.trial txi2p
+    runHook postCheck
+  '';
+
+  meta = {
+    description = "I2P bindings for Twisted";
+    homepage = "https://github.com/tahoe-lafs/txi2p";
+    license = lib.licenses.isc;
+    maintainers = with lib.maintainers; [ dotlambda ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index a478f27054ff..6347b20e730c 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -11910,6 +11910,8 @@ self: super: with self; {
 
   txgithub = callPackage ../development/python-modules/txgithub { };
 
+  txi2p-tahoe = callPackage ../development/python-modules/txi2p-tahoe { };
+
   txredisapi = callPackage ../development/python-modules/txredisapi { };
 
   txrequests = callPackage ../development/python-modules/txrequests { };