diff --git a/pkgs/development/python-modules/mujson/default.nix b/pkgs/development/python-modules/mujson/default.nix
new file mode 100644
index 000000000000..55c028fc90cb
--- /dev/null
+++ b/pkgs/development/python-modules/mujson/default.nix
@@ -0,0 +1,31 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "mujson";
+  version = "1.4";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-J9nPGxDkLQje6AkL9cewNqmQ7Z+00TXBEr3p71E2cnE=";
+  };
+
+  # LICENSE file missing from src
+  # https://github.com/mattgiles/mujson/issues/8
+  postPatch = ''
+    substituteInPlace setup.cfg \
+      --replace "license_file = LICENSE" ""
+  '';
+
+  # No tests
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Use the fastest JSON functions available at import time";
+    homepage = "https://github.com/mattgiles/mujson";
+    license = licenses.mit;
+    maintainers = with maintainers; [ artturin ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index ee1258aa64a1..03be94888531 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -4942,6 +4942,8 @@ in {
 
   mutf8 = callPackage ../development/python-modules/mutf8 { };
 
+  mujson = callPackage ../development/python-modules/mujson { };
+
   mwclient = callPackage ../development/python-modules/mwclient { };
 
   mwdblib = callPackage ../development/python-modules/mwdblib { };