diff --git a/pkgs/development/ocaml-modules/sexplib/111.25.00.nix b/pkgs/development/ocaml-modules/sexplib/111.25.00.nix
deleted file mode 100644
index adf878bca03..00000000000
--- a/pkgs/development/ocaml-modules/sexplib/111.25.00.nix
+++ /dev/null
@@ -1,28 +0,0 @@
-{stdenv, fetchurl, ocaml, findlib, type_conv, camlp4}:
-
-if !stdenv.lib.versionAtLeast ocaml.version "4.00"
-|| stdenv.lib.versionAtLeast ocaml.version "4.03"
-then throw "sexlib-111.25.00 is not available for OCaml ${ocaml.version}" else
-
-
-stdenv.mkDerivation {
-  name = "ocaml-sexplib-111.25.00";
-
-  src = fetchurl {
-    url = "https://ocaml.janestreet.com/ocaml-core/111.25.00/individual/sexplib-111.25.00.tar.gz";
-    sha256 = "0qh0zqp5nakqpmmhh4x7cg03vqj3j2bj4zj0nqdlksai188p9ila";
-  };
-
-  buildInputs = [ocaml findlib];
-  propagatedBuildInputs = [type_conv camlp4];
-
-  createFindlibDestdir = true;
-
-  meta = with stdenv.lib; {
-    homepage = "https://ocaml.janestreet.com/";
-    description = "Library for serializing OCaml values to and from S-expressions";
-    license = licenses.asl20;
-    maintainers = [ maintainers.vbgl maintainers.ericbmerritt ];
-    platforms = ocaml.meta.platforms or [];
-  };
-}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 698f0a8a29d..ac78eab4a94 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -770,14 +770,11 @@ let
       then type_conv_108_08_00
       else null;
 
-    sexplib_111_25_00 = callPackage ../development/ocaml-modules/sexplib/111.25.00.nix { };
     sexplib_112_24_01 = callPackage ../development/ocaml-modules/sexplib/112.24.01.nix { };
 
     sexplib_p4 =
       if lib.versionOlder "4.02" ocaml.version
       then sexplib_112_24_01
-      else if lib.versionOlder "4.00" ocaml.version
-      then sexplib_111_25_00
       else null;
 
     ocaml-protoc = callPackage ../development/ocaml-modules/ocaml-protoc { };