diff --git a/pkgs/by-name/cy/cynthion/package.nix b/pkgs/by-name/cy/cynthion/package.nix
new file mode 100644
index 000000000000..70c767cf8ef7
--- /dev/null
+++ b/pkgs/by-name/cy/cynthion/package.nix
@@ -0,0 +1,26 @@
+{
+  python3,
+  fetchFromGitHub,
+}:
+
+let
+  python = python3.override {
+    self = python3;
+    packageOverrides = _: super: {
+      amaranth = super.amaranth.overridePythonAttrs rec {
+        version = "0.4.1";
+
+        src = fetchFromGitHub {
+          owner = "amaranth-lang";
+          repo = "amaranth";
+          rev = "refs/tags/v${version}";
+          sha256 = "sha256-VMgycvxkphdpWIib7aZwh588En145RgYlG2Zfi6nnDo=";
+        };
+
+        postPatch = null;
+      };
+    };
+  };
+in
+
+python.pkgs.toPythonApplication python.pkgs.cynthion