diff --git a/pkgs/by-name/ow/owi/package.nix b/pkgs/by-name/ow/owi/package.nix
new file mode 100644
index 000000000000..65d1729540ef
--- /dev/null
+++ b/pkgs/by-name/ow/owi/package.nix
@@ -0,0 +1,92 @@
+{
+  lib,
+  ocaml-ng,
+  fetchFromGitHub,
+  llvmPackages,
+  rustc,
+  zig,
+  makeWrapper,
+  unstableGitUpdater,
+}:
+
+let
+  ocamlPackages = ocaml-ng.ocamlPackages_5_1;
+in
+ocamlPackages.buildDunePackage rec {
+  pname = "owi";
+  version = "0.2-unstable-2025-05-05";
+
+  src = fetchFromGitHub {
+    owner = "ocamlpro";
+    repo = "owi";
+    rev = "e4c2e85f1364714a77a925ec29321cf9b8fe90f4";
+    fetchSubmodules = true;
+    hash = "sha256-ewaAkSyxtiiE8WcHusOyZDesqI61kCEN3pMb99R7Dkw=";
+  };
+
+  nativeBuildInputs = with ocamlPackages; [
+    findlib
+    menhir
+    # unwrapped because wrapped tries to enforce a target and the build
+    # script wants to do its own thing
+    llvmPackages.clang-unwrapped
+    # lld + llc isn't included in unwrapped, so we pull it in here
+    llvmPackages.bintools-unwrapped
+    rustc
+    zig
+    makeWrapper
+  ];
+
+  buildInputs = with ocamlPackages; [
+    bos
+    cmdliner
+    digestif
+    dolmen_type
+    dune-build-info
+    dune-site
+    hc
+    integers
+    menhir
+    menhirLib
+    ocaml_intrinsics
+    patricia-tree
+    prelude
+    processor
+    pyml
+    re2
+    scfg
+    sedlex
+    smtml
+    uutf
+    xmlm
+    yojson
+    z3
+    zarith
+  ];
+
+  postInstall = ''
+    wrapProgram $out/bin/owi \
+      --prefix PATH : ${
+        lib.makeBinPath [
+          llvmPackages.bintools-unwrapped
+          llvmPackages.clang-unwrapped
+          rustc
+          zig
+        ]
+      }
+  '';
+
+  doCheck = false;
+
+  passthru.updateScript = unstableGitUpdater { };
+
+  meta = {
+    description = "Symbolic execution for Wasm, C, C++, Rust and Zig";
+    homepage = "https://ocamlpro.github.io/owi/";
+    downloadPage = "https://github.com/OCamlPro/owi";
+    license = lib.licenses.agpl3Plus;
+    maintainers = [ lib.maintainers.ethancedwards8 ];
+    teams = with lib.teams; [ ngi ];
+    mainProgram = "owi";
+  };
+}