diff --git a/pkgs/development/python-modules/raspyrfm-client/default.nix b/pkgs/development/python-modules/raspyrfm-client/default.nix
index 25bd389e83f7..5d5a20ff9589 100644
--- a/pkgs/development/python-modules/raspyrfm-client/default.nix
+++ b/pkgs/development/python-modules/raspyrfm-client/default.nix
@@ -2,51 +2,36 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
-  setuptools,
-  rstr,
-  python,
+  poetry-core,
+  pytestCheckHook,
+  xeger,
 }:
 
 buildPythonPackage rec {
   pname = "raspyrfm-client";
-  version = "1.2.8";
+  version = "1.2.9";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "markusressel";
     repo = "raspyrfm-client";
-    tag = "v${version}";
-    hash = "sha256-WiL69bb4h8xVdMYxAVU0NHEfTWyW2NVR86zigsr5dmk=";
+    tag = version;
+    hash = "sha256-+TraMrVoR8GXrjfjJnu1uyyW6KTnu8KrRqAHYU8thFw=";
   };
 
-  # while we may not actually be on master, the script needs a git branch to function
-  # and master here is better than beta or pre-alpha
-  postPatch = ''
-    substituteInPlace ./setup.py \
-      --replace-fail 'subprocess.check_output(["git", "rev-parse", "--abbrev-ref", "HEAD"])' '"master"' \
-      --replace-fail 'GIT_BRANCH.decode()' '"master"' \
-      --replace-fail 'GIT_BRANCH.rstrip()' '"master"'
-  '';
-
-  build-system = [ setuptools ];
+  build-system = [ poetry-core ];
 
   pythonImportsCheck = [ "raspyrfm_client" ];
 
-  nativeCheckInputs = [ rstr ];
-
-  # pytestCheckHook does not auto detect the only test, run manually
-  checkPhase = ''
-    runHook preCheck
-
-    ${python.interpreter} tests/automatic_tests.py
-
-    runHook postCheck
-  '';
+  nativeCheckInputs = [
+    pytestCheckHook
+    xeger
+  ];
 
   meta = {
     description = "Send rc signals with the RaspyRFM module";
     homepage = "https://github.com/markusressel/raspyrfm-client";
-    changelog = "https://github.com/markusressel/raspyrfm-client/releases/tag/v${version}";
+    changelog = "https://github.com/markusressel/raspyrfm-client/releases/tag/${src.tag}";
     maintainers = with lib.maintainers; [ ethancedwards8 ];
   };
 }
diff --git a/pkgs/development/python-modules/xeger/default.nix b/pkgs/development/python-modules/xeger/default.nix
new file mode 100644
index 000000000000..0dc10b852e91
--- /dev/null
+++ b/pkgs/development/python-modules/xeger/default.nix
@@ -0,0 +1,35 @@
+{
+  buildPythonPackage,
+  fetchFromGitHub,
+  lib,
+  pytestCheckHook,
+  setuptools,
+}:
+
+buildPythonPackage rec {
+  pname = "xeger";
+  version = "0.3.5";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "crdoconnor";
+    repo = "xeger";
+    tag = version;
+    hash = "sha256-XujytGzBwJ59C5VihuFUJUxqhyjOIU4sI60hXUqLQvM=";
+  };
+
+  build-system = [ setuptools ];
+
+  pythonImportsCheck = [ "xeger" ];
+
+  nativeCheckInputs = [
+    pytestCheckHook
+  ];
+
+  meta = {
+    description = "Library to generate random strings from regular expressions";
+    homepage = "https://github.com/crdoconnor/xeger";
+    license = lib.licenses.bsd3;
+    maintainers = [ lib.maintainers.dotlambda ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 5e46457699d2..492bcb5b5de1 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -20376,6 +20376,8 @@ self: super: with self; {
 
   xeddsa = toPythonModule (callPackage ../development/python-modules/xeddsa { });
 
+  xeger = callPackage ../development/python-modules/xeger { };
+
   xen = toPythonModule (pkgs.xen.override { python3Packages = self; });
 
   xformers = callPackage ../development/python-modules/xformers {