diff --git a/pkgs/development/ocaml-modules/tar/eio.nix b/pkgs/development/ocaml-modules/tar/eio.nix
new file mode 100644
index 000000000000..dbdf250447a0
--- /dev/null
+++ b/pkgs/development/ocaml-modules/tar/eio.nix
@@ -0,0 +1,26 @@
+{
+  buildDunePackage,
+  tar,
+  eio,
+  git,
+}:
+
+buildDunePackage {
+  pname = "tar-eio";
+  inherit (tar) version src doCheck;
+
+  minimalOCamlVersion = "5.1";
+
+  propagatedBuildInputs = [
+    tar
+    eio
+  ];
+
+  nativeCheckInputs = [
+    git
+  ];
+
+  meta = tar.meta // {
+    description = "Decode and encode tar format files using Eio";
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index b0f9d2f4e324..8c2a3770961d 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1968,6 +1968,10 @@ let
           inherit (pkgs) git;
         };
 
+        tar-eio = callPackage ../development/ocaml-modules/tar/eio.nix {
+          inherit (pkgs) git;
+        };
+
         tcpip = callPackage ../development/ocaml-modules/tcpip { };
 
         tcslib = callPackage ../development/ocaml-modules/tcslib { };