diff --git a/pkgs/by-name/ar/arwen/package.nix b/pkgs/by-name/ar/arwen/package.nix
new file mode 100644
index 000000000000..71d35e8a80e3
--- /dev/null
+++ b/pkgs/by-name/ar/arwen/package.nix
@@ -0,0 +1,46 @@
+{
+  lib,
+  rustPlatform,
+  fetchFromGitHub,
+}:
+
+rustPlatform.buildRustPackage (finalAttrs: {
+  pname = "arwen";
+  version = "0.0.5-unstable-2026-04-07";
+
+  src = fetchFromGitHub {
+    owner = "nichmor";
+    repo = "arwen";
+    rev = "696351a8c208315b0dfd4a1e5c37288a689ccd2e";
+    hash = "sha256-6RW8BeKjoxeO8SBz/VdZGnrRW+EIKq5NtrFdM0lx0+o=";
+  };
+
+  cargoHash = "sha256-bj7YB7xNlfdrYYZv3CDuqkm+/pg+C1KwizPTlNqQWt8=";
+
+  __structuredAttrs = true;
+
+  meta = {
+    description = "Cross-platform patching of shared libraries in Rust";
+    longDescription = ''
+      Arwen is a command-line utility and Rust library designed to modify
+      executable files and shared libraries.
+
+      Specifically, it targets the ELF format (commonly used on Linux, BSD, and
+      other Unix-like systems) and the Mach-O format (used on macOS and iOS).
+
+      It allows you to inspect and rewrite various properties within these
+      files that influence how they load and link with other libraries at
+      runtime.
+
+      Think of arwen as a modern, unified, Rust-based alternative to the
+      widely-used patchelf (for ELF files) and install_name_tool (for Mach-O
+      files). It combines the core functionalities of both into a single tool.
+    '';
+    homepage = "https://github.com/nichmor/arwen";
+    mainProgram = "arwen";
+    license = lib.licenses.mit;
+    platforms = lib.platforms.all;
+    maintainers = with lib.maintainers; [ eljamm ];
+    teams = with lib.teams; [ ngi ];
+  };
+})