diff --git a/pkgs/by-name/se/seppo/mcdb.nix b/pkgs/by-name/se/seppo/mcdb.nix
new file mode 100644
index 000000000000..afe8436c7e4f
--- /dev/null
+++ b/pkgs/by-name/se/seppo/mcdb.nix
@@ -0,0 +1,26 @@
+{
+  buildDunePackage,
+  camlp-streams,
+  optint,
+  alcotest,
+  uri,
+  base64,
+  seppo,
+}:
+
+buildDunePackage {
+  pname = "mcdb";
+
+  inherit (seppo) version src;
+
+  propagatedBuildInputs = [
+    camlp-streams
+    optint
+  ];
+
+  checkInputs = [
+    alcotest
+    uri
+    base64
+  ];
+}
diff --git a/pkgs/by-name/se/seppo/package.nix b/pkgs/by-name/se/seppo/package.nix
new file mode 100644
index 000000000000..3121d2274cc9
--- /dev/null
+++ b/pkgs/by-name/se/seppo/package.nix
@@ -0,0 +1,69 @@
+{
+  ocamlPackages,
+  fetchFromGitea,
+  ocaml-crunch,
+  seppo,
+  lib,
+}:
+
+let
+  mcdb = ocamlPackages.callPackage ./mcdb.nix { inherit seppo; };
+in
+
+ocamlPackages.buildDunePackage {
+  pname = "seppo";
+  version = "0-unstable-2025-06-03";
+
+  src = fetchFromGitea {
+    domain = "codeberg.org";
+    owner = "seppo";
+    repo = "seppo";
+    rev = "33ae3e9f61d596fb91d3ab1a91fc26ae80981a93";
+    hash = "sha256-tOIIfYBLcZqQzoPxAVkE8RGX0sugUmDGpxIhIZ5Wy+w=";
+  };
+
+  # Provide git sha to avoid git dependency
+  env.GIT_SHA = seppo.src.rev;
+
+  # Static build fails to find correct static libraries
+  postPatch = ''
+    sed -i 's/-static/""/' bin/gen_flags.sh
+  '';
+
+  nativeBuildInputs = [
+    ocaml-crunch
+  ];
+
+  buildInputs = with ocamlPackages; [
+    mcdb
+
+    camlp-streams
+    cohttp-lwt-unix
+    crunch
+    csexp
+    decoders-ezjsonm
+    lambdasoup
+    lwt_ppx
+    mirage-crypto-rng
+    ocaml_sqlite3
+    optint
+    safepass
+    timedesc
+    tls-lwt
+    tyre
+    uucp
+    uuidm
+    uunf
+    uutf
+    x509
+    xmlm
+  ];
+
+  meta = {
+    homepage = "https://seppo.mro.name";
+    description = "Personal Social Web";
+    license = lib.licenses.gpl3Plus;
+    maintainers = with lib.maintainers; [ infinidoge ];
+    mainProgram = "seppo";
+  };
+}