diff --git a/pkgs/build-support/nix-prefetch-github/default.nix b/pkgs/build-support/nix-prefetch-github/default.nix
new file mode 100644
index 00000000000..48297e583af
--- /dev/null
+++ b/pkgs/build-support/nix-prefetch-github/default.nix
@@ -0,0 +1,30 @@
+{ python3
+, fetchFromGitHub
+, stdenv
+}:
+
+python3.pkgs.buildPythonApplication rec {
+  pname = "nix-prefetch-github";
+  version = "1.3";
+
+  src = fetchFromGitHub {
+    owner = "seppeljordan";
+    repo = "nix-prefetch-github";
+    rev = "${version}";
+    sha256 = "1rinbv1q4q8m27ih6l81w1lsmwn6cz7q3iyjiycklywpi8684dh6";
+  };
+
+  propagatedBuildInputs = with python3.pkgs; [
+    attrs
+    click
+    effect
+    jinja2
+    requests
+  ];
+  meta = with stdenv.lib; {
+    description = "Prefetch sources from github";
+    homepage = https://github.com/seppeljordan/nix-prefetch-github;
+    license = licenses.gpl3;
+    maintainers = [ maintainers.seppeljordan ];
+  };
+}
diff --git a/pkgs/development/python-modules/effect/default.nix b/pkgs/development/python-modules/effect/default.nix
new file mode 100644
index 00000000000..2738d228339
--- /dev/null
+++ b/pkgs/development/python-modules/effect/default.nix
@@ -0,0 +1,33 @@
+{ buildPythonPackage
+, fetchPypi
+, lib
+, six
+, attrs
+, pytest
+, testtools
+}:
+buildPythonPackage rec {
+  version = "0.11.0";
+  pname = "effect";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1q75w4magkqd8ggabhhzzxmxakpdnn0vdg7ygj89zdc9yl7561q6";
+  };
+  checkInputs = [
+    pytest
+    testtools
+  ];
+  propagatedBuildInputs = [
+    six
+    attrs
+  ];
+  checkPhase = ''
+    pytest .
+  '';
+  meta = with lib; {
+    description = "Pure effects for Python";
+    homepage = https://github.com/python-effect/effect;
+    license = licenses.mit;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 8764741b21b..889d2040dc0 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -20934,6 +20934,8 @@ with pkgs;
 
   nix-pin = callPackage ../tools/package-management/nix-pin { };
 
+  nix-prefetch-github = callPackage ../build-support/nix-prefetch-github {};
+
   inherit (callPackages ../tools/package-management/nix-prefetch-scripts { })
     nix-prefetch-bzr
     nix-prefetch-cvs
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index bf2906be53f..9349cc3711a 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -5160,6 +5160,7 @@ in {
     };
   };
 
+  effect = callPackage ../development/python-modules/effect {};
 
   elpy = buildPythonPackage rec {
     name = "elpy-${version}";