diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index fe2662139206..911f71a2cf05 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -3079,6 +3079,12 @@
     githubId = 1689801;
     name = "Mikhail Chekan";
   };
+  chen = {
+    email = "i@cuichen.cc";
+    github = "cu1ch3n";
+    githubId = 80438676;
+    name = "Chen Cui";
+  };
   ChengCat = {
     email = "yu@cheng.cat";
     github = "ChengCat";
diff --git a/pkgs/by-name/ln/lngen/package.nix b/pkgs/by-name/ln/lngen/package.nix
new file mode 100644
index 000000000000..1b06a5b1966b
--- /dev/null
+++ b/pkgs/by-name/ln/lngen/package.nix
@@ -0,0 +1,23 @@
+{ lib
+, haskellPackages
+, fetchFromGitHub
+}:
+
+haskellPackages.mkDerivation {
+  pname = "lngen";
+  version = "unstable-2023-10-17";
+  src = fetchFromGitHub {
+    owner = "plclub";
+    repo = "lngen";
+    rev = "c7645001404e0e2fec2c56f128e30079b5b3fac6";
+    hash = "sha256-2vUYHtl9yAadwdTtsjTI0klP+nRSYGXVpaSwD9EBTTI=";
+  };
+  isLibrary = true;
+  isExecutable = true;
+  libraryHaskellDepends = with haskellPackages; [ base syb parsec containers mtl ];
+  executableHaskellDepends = with haskellPackages; [ base ];
+  homepage = "https://github.com/plclub/lngen";
+  description = "Tool for generating Locally Nameless definitions and proofs in Coq, working together with Ott";
+  maintainers = with lib.maintainers; [ chen ];
+  license = lib.licenses.mit;
+}