diff --git a/pkgs/development/coq-modules/ceres-bs/default.nix b/pkgs/development/coq-modules/ceres-bs/default.nix
new file mode 100644
index 000000000000..f1e09094334d
--- /dev/null
+++ b/pkgs/development/coq-modules/ceres-bs/default.nix
@@ -0,0 +1,42 @@
+{
+  lib,
+  mkCoqDerivation,
+  coq,
+  metarocq,
+  stdlib,
+  version ? null,
+}:
+
+mkCoqDerivation {
+
+  pname = "ceres-bs";
+  repo = "rocq-ceres-bytestring";
+  opam-name = "rocq-ceres-bytestring";
+  owner = "peregrine-project";
+
+  inherit version;
+  defaultVersion =
+    let
+      case = case: out: { inherit case out; };
+    in
+    with lib.versions;
+    lib.switch coq.version [
+      (case (range "9.0" "9.1") "1.0.0")
+    ] null;
+  release."1.0.0".sha256 = "sha256-aB/YWw4E1myIYDRlNs/dEXoI9HDKl1/lsPGMYzjyJsU=";
+  releaseRev = v: "v${v}";
+
+  useDune = true;
+
+  propagatedBuildInputs = [
+    coq.ocamlPackages.findlib
+    stdlib
+    metarocq
+  ];
+
+  meta = {
+    description = "Library for serialization via S-expressions using bytestrings. Alternative to coq-ceres which uses String from standard library.";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ _4ever2 ];
+  };
+}
diff --git a/pkgs/top-level/coq-packages.nix b/pkgs/top-level/coq-packages.nix
index f9464c39fae8..32bd68a998ab 100644
--- a/pkgs/top-level/coq-packages.nix
+++ b/pkgs/top-level/coq-packages.nix
@@ -70,6 +70,7 @@ let
           null;
       category-theory = callPackage ../development/coq-modules/category-theory { };
       ceres = callPackage ../development/coq-modules/ceres { };
+      ceres-bs = callPackage ../development/coq-modules/ceres-bs { };
       Cheerios = callPackage ../development/coq-modules/Cheerios { };
       coinduction = callPackage ../development/coq-modules/coinduction { };
       CoLoR = callPackage ../development/coq-modules/CoLoR (