diff --git a/pkgs/development/python-modules/pycategories/default.nix b/pkgs/development/python-modules/pycategories/default.nix
new file mode 100644
index 000000000000..55f30f9e55a9
--- /dev/null
+++ b/pkgs/development/python-modules/pycategories/default.nix
@@ -0,0 +1,35 @@
+{ buildPythonPackage
+, callPackage
+, pytestcov
+, fetchPypi
+, lib
+, pytest
+, pythonOlder
+, pytestrunner
+}:
+
+buildPythonPackage rec {
+  pname = "pycategories";
+  version = "1.2.0";
+  disabled = pythonOlder "3.4";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "bd70ecb5e94e7659e564ea153f0c7673291dc37c526c246800fc08d6c5378099";
+  };
+
+  nativeBuildInputs = [ pytestrunner ];
+
+  # Is private because the author states it's unmaintained
+  # and shouldn't be used in production code
+  propagatedBuildInputs = [ (callPackage ./infix.nix { }) ];
+
+  checkInputs = [ pytest pytestcov ];
+
+  meta = with lib; {
+    homepage = "https://gitlab.com/danielhones/pycategories";
+    description = "Implementation of some concepts from category theory";
+    license = licenses.mit;
+    maintainers = with maintainers; [ dmvianna ];
+  };
+}
diff --git a/pkgs/development/python-modules/pycategories/infix.nix b/pkgs/development/python-modules/pycategories/infix.nix
new file mode 100644
index 000000000000..f3b4d2548181
--- /dev/null
+++ b/pkgs/development/python-modules/pycategories/infix.nix
@@ -0,0 +1,23 @@
+{ buildPythonPackage
+, lib
+, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "infix";
+  version = "1.2";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "a1bfdcf875bc072f41e426d0673f2e3017750743bb90cc725fffb292eb09648c";
+  };
+
+  # No tests
+  doCheck = false;
+
+  meta = {
+    homepage = "https://github.com/borntyping/python-infix";
+    description = "A decorator that allows functions to be used as infix functions";
+    license = lib.licenses.mit;
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index c38f1a740442..f331128f0fb0 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -682,6 +682,8 @@ in {
     inherit (pkgs) pkgconfig;
   };
 
+  pycategories = callPackage ../development/python-modules/pycategories { };
+
   pycangjie = disabledIf (!isPy3k) (callPackage ../development/python-modules/pycangjie {
     inherit (pkgs) pkgconfig;
   });