diff --git a/pkgs/development/python-modules/canmatrix/default.nix b/pkgs/development/python-modules/canmatrix/default.nix
index 372a8ed685fb..511afe5f353a 100644
--- a/pkgs/development/python-modules/canmatrix/default.nix
+++ b/pkgs/development/python-modules/canmatrix/default.nix
@@ -4,50 +4,39 @@
   buildPythonPackage,
   click,
   fetchFromGitHub,
-  future,
-  importlib-metadata,
   ldfparser,
   lxml,
   openpyxl,
+  pytest-cov-stub,
+  pytest-timeout,
   pytestCheckHook,
   pythonOlder,
   pyyaml,
   setuptools,
-  six,
-  versioneer,
   xlrd,
   xlwt,
 }:
 
 buildPythonPackage rec {
   pname = "canmatrix";
-  version = "1.0";
+  version = "1.2";
   pyproject = true;
 
-  disabled = pythonOlder "3.7";
+  disabled = pythonOlder "3.9";
 
   src = fetchFromGitHub {
     owner = "ebroecker";
     repo = "canmatrix";
     tag = version;
-    hash = "sha256-UUJnLVt+uOj8Eav162btprkUeTemItGrSnBBB9UhJJI=";
+    hash = "sha256-PfegsFha7ernSqnMeaDoLf1jLx1CiOoiYi34dESEgBY=";
   };
 
-  postPatch = ''
-    # Remove vendorized versioneer.py
-    rm versioneer.py
-  '';
-
   build-system = [ setuptools ];
 
-  nativeBuildInputs = [ versioneer ];
-
   dependencies = [
     attrs
     click
-    future
-    six
-  ] ++ lib.optionals (pythonOlder "3.8") [ importlib-metadata ];
+  ];
 
   optional-dependencies = {
     arxml = [ lxml ];
@@ -64,12 +53,15 @@ buildPythonPackage rec {
   };
 
   nativeCheckInputs = [
+    pytest-cov-stub
+    pytest-timeout
     pytestCheckHook
   ] ++ lib.flatten (builtins.attrValues optional-dependencies);
 
   pytestFlagsArray = [
     # long_envvar_name_imports requires stable key value pair ordering
     "-s src/canmatrix"
+    "tests/"
   ];
 
   disabledTests = [ "long_envvar_name_imports" ];