diff --git a/pkgs/development/python-modules/effect/default.nix b/pkgs/development/python-modules/effect/default.nix
new file mode 100644
index 000000000000..d5fdf2d3f85d
--- /dev/null
+++ b/pkgs/development/python-modules/effect/default.nix
@@ -0,0 +1,29 @@
+{ buildPythonPackage
+, fetchPypi
+, lib
+, attrs
+, six
+}:
+let
+
+version = "0.11.0";
+pname = "effect";
+
+in
+buildPythonPackage {
+  inherit version pname;                      
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1q75w4magkqd8ggabhhzzxmxakpdnn0vdg7ygj89zdc9yl7561q6";
+  };
+  propagatedBuildInputs = [
+    six
+    attrs
+  ];
+  doCheck = false;
+  meta = with lib; {
+    description = "pure effects for Python";
+    homepage = https://github.com/python-effect/effect;
+    license = licenses.mit;
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 7868f7d7ff06..c086c14e303e 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -5180,6 +5180,7 @@ in {
     };
   };
 
+  effect = callPackage ../development/python-modules/effect {};
 
   elpy = buildPythonPackage rec {
     name = "elpy-${version}";