diff --git a/pkgs/by-name/ma/mat2/package.nix b/pkgs/by-name/ma/mat2/package.nix
new file mode 100644
index 000000000000..ac4f59620916
--- /dev/null
+++ b/pkgs/by-name/ma/mat2/package.nix
@@ -0,0 +1,9 @@
+{
+  # On Python 3.13, `tests/test_libmat2.py::TestCleaning::test_html` fails with
+  #
+  #     ValueError: The closing tag title doesn't have a corresponding opening one in ./tests/data/clean.html.
+  python312Packages,
+}:
+
+with python312Packages;
+toPythonApplication mat2
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 976a7f6637bf..04521e6c4eab 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2228,8 +2228,6 @@ with pkgs;
 
   maliit-keyboard = libsForQt5.callPackage ../applications/misc/maliit-keyboard { };
 
-  mat2 = with python3.pkgs; toPythonApplication mat2;
-
   materialx = with python3Packages; toPythonApplication materialx;
 
   # while building documentation meson may want to run binaries for host