diff --git a/pkgs/development/ocaml-modules/decompress/1.2.nix b/pkgs/development/ocaml-modules/decompress/1.2.nix
deleted file mode 100644
index e81202ea58f..00000000000
--- a/pkgs/development/ocaml-modules/decompress/1.2.nix
+++ /dev/null
@@ -1,28 +0,0 @@
-{ lib, fetchurl, buildDunePackage
-, checkseum, bigarray-compat, optint
-}:
-
-buildDunePackage rec {
-  version = "1.2.0";
-  pname = "decompress";
-
-  minimumOCamlVersion = "4.07";
-
-  useDune2 = true;
-
-  src = fetchurl {
-    url = "https://github.com/mirage/decompress/releases/download/v${version}/decompress-v${version}.tbz";
-    sha256 = "1c3sq9a6kpzl0pj3gmg7w18ssjjl70yv0r3l7qjprcncjx23v62i";
-  };
-
-  propagatedBuildInputs = [ optint bigarray-compat checkseum ];
-  # required hxd version is not available in nixpkgs
-  doCheck = false;
-
-  meta = {
-    description = "Pure OCaml implementation of Zlib";
-    license = lib.licenses.mit;
-    maintainers = [ lib.maintainers.vbgl ];
-    homepage = "https://github.com/mirage/decompress";
-  };
-}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 6b7d59b6fc9..396423a339a 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -238,8 +238,6 @@ let
 
     decompress =  callPackage ../development/ocaml-modules/decompress { };
 
-    decompress-1-2 = callPackage ../development/ocaml-modules/decompress/1.2.nix { };
-
     diet =  callPackage ../development/ocaml-modules/diet { };
 
     digestif =  callPackage ../development/ocaml-modules/digestif { };