diff --git a/pkgs/by-name/mo/modest/package.nix b/pkgs/by-name/mo/modest/package.nix
new file mode 100644
index 000000000000..600524d3ec0a
--- /dev/null
+++ b/pkgs/by-name/mo/modest/package.nix
@@ -0,0 +1,37 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  cmake,
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "modest";
+  version = "0-unstable-2021-08-03";
+
+  src = fetchFromGitHub {
+    owner = "lexborisov";
+    repo = "modest";
+    rev = "2540a03259fc62fe15f47e85c20b2eedd5af66de";
+    hash = "sha256-o3asVErtc9CYRb3ZZFE5DYyT/Pjr7TZ79BLPnh6CCT0=";
+  };
+
+  nativeBuildInputs = [
+    cmake
+  ];
+
+  env.NIX_CFLAGS_COMPILE = toString (
+    lib.optionals stdenv.hostPlatform.isDarwin [
+      "-Wno-void-pointer-to-enum-cast"
+      "-Wno-unused-but-set-variable"
+    ]
+  );
+
+  meta = {
+    description = "Fast HTML renderer implemented as a pure C99 library with no outside dependencies";
+    homepage = "https://github.com/lexborisov/Modest";
+    license = lib.licenses.lgpl21;
+    maintainers = [ lib.maintainers.drupol ];
+    platforms = lib.platforms.all;
+  };
+})