diff --git a/pkgs/development/python-modules/spatialmath-python/default.nix b/pkgs/development/python-modules/spatialmath-python/default.nix
index 16c43e079c30..48314a348209 100644
--- a/pkgs/development/python-modules/spatialmath-python/default.nix
+++ b/pkgs/development/python-modules/spatialmath-python/default.nix
@@ -1,5 +1,6 @@
 {
   lib,
+  stdenv,
   buildPythonPackage,
   fetchPypi,
   pythonOlder,
@@ -10,18 +11,12 @@
   numpy,
   scipy,
   typing-extensions,
-  coverage,
-  flake8,
-  pytest,
-  pytest-timeout,
-  pytest-xvfb,
-  sympy,
   pytestCheckHook,
 }:
 
 buildPythonPackage rec {
   pname = "spatialmath-python";
-  version = "1.1.11";
+  version = "1.1.13";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
@@ -29,17 +24,19 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "spatialmath_python";
     inherit version;
-    hash = "sha256-9EUlDGkpV/a73XWvrbtZLK8wrR8Am5EOkv3iSf9J4rM=";
+    hash = "sha256-BhIB4VapnARkzyhps8xRWnQTAlRB8aVPDpNuN/FNezo=";
   };
 
-  nativeBuildInputs = [
+  build-system = [
     oldest-supported-numpy
     setuptools
   ];
 
   pythonRemoveDeps = [ "pre-commit" ];
 
-  propagatedBuildInputs = [
+  pythonRelaxDeps = [ "matplotlib" ];
+
+  dependencies = [
     ansitable
     matplotlib
     numpy
@@ -47,21 +44,17 @@ buildPythonPackage rec {
     typing-extensions
   ];
 
-  optional-dependencies = {
-    dev = [
-      coverage
-      flake8
-      pytest
-      pytest-timeout
-      pytest-xvfb
-      sympy
-    ];
-  };
-
   pythonImportsCheck = [ "spatialmath" ];
 
   nativeCheckInputs = [ pytestCheckHook ];
 
+  disabledTestPaths = [
+    # tests hang
+    "tests/test_spline.py"
+  ];
+
+  env.MPLBACKEND = lib.optionalString stdenv.hostPlatform.isDarwin "Agg";
+
   meta = with lib; {
     description = "Provides spatial maths capability for Python";
     homepage = "https://pypi.org/project/spatialmath-python/";