diff --git a/pkgs/by-name/ge/geomcpp/package.nix b/pkgs/by-name/ge/geomcpp/package.nix
new file mode 100644
index 000000000000..8b6f70498e80
--- /dev/null
+++ b/pkgs/by-name/ge/geomcpp/package.nix
@@ -0,0 +1,47 @@
+{
+  stdenv,
+  lib,
+  fetchFromGitHub,
+  cmake,
+  glm,
+  gtest,
+  tinycmmc,
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "geomcpp";
+  version = "0.0.0-unstable-2025-06-11";
+
+  src = fetchFromGitHub {
+    owner = "Grumbel";
+    repo = "geomcpp";
+    rev = "282e3710fbe6dacee630391e4af8ffe03181f8a9";
+    sha256 = "sha256-M4a6P6J/PBDklpOiR81Nah0STlXFI48+mQkNqMBicKQ=";
+  };
+
+  nativeBuildInputs = [ cmake ];
+  buildInputs = [
+    gtest
+    tinycmmc
+  ];
+  propagatedBuildInputs = [ glm ];
+
+  cmakeFlags = [
+    "-DWARNINGS=ON"
+    "-DWERROR=ON"
+    "-DBUILD_TESTS=ON"
+  ];
+
+  doCheck = true;
+
+  postPatch = ''
+    echo $version > VERSION
+  '';
+
+  meta = {
+    description = "Collection of point, size and rect classes";
+    maintainers = [ lib.maintainers.SchweGELBin ];
+    platforms = lib.platforms.linux;
+    license = lib.licenses.free;
+  };
+})