diff --git a/pkgs/by-name/ge/gersemi/package.nix b/pkgs/by-name/ge/gersemi/package.nix
new file mode 100644
index 0000000..d072658
--- /dev/null
+++ b/pkgs/by-name/ge/gersemi/package.nix
@@ -0,0 +1,35 @@
+{ lib
+, python3
+, fetchPypi
+}:
+
+python3.pkgs.buildPythonApplication rec {
+  pname = "gersemi";
+  version = "0.10.0";
+  format = "setuptools";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-Gd3wZNbBIYo2i0n1DlyHg3s5c+BBJ0nppMw8IVcfKUM=";
+  };
+
+  # Remove dataclasses backport requirement since it doesn't work on newer
+  # Python.
+  patchPhase = ''
+    sed -i '/dataclasses/d' setup.py
+  '';
+
+  propagatedBuildInputs = with python3.pkgs; [
+    appdirs
+    colorama
+    lark
+    pyyaml
+  ];
+
+  meta = {
+    description = "A formatter to make your CMake code the real treasure";
+    homepage = "https://github.com/BlankSpruce/gersemi";
+    license = lib.licenses.mpl20;
+    platforms = python3.meta.platforms;
+  };
+}