diff --git a/pkgs/development/ocaml-modules/mirage-crypto/rng.nix b/pkgs/development/ocaml-modules/mirage-crypto/rng.nix
index bbc7823e1f09..5fd9e1289a6e 100644
--- a/pkgs/development/ocaml-modules/mirage-crypto/rng.nix
+++ b/pkgs/development/ocaml-modules/mirage-crypto/rng.nix
@@ -1,17 +1,16 @@
 { buildDunePackage, mirage-crypto, ounit2, randomconv, dune-configurator
-, cstruct, duration, logs, mtime, ocaml_lwt }:
+, cstruct, duration, logs }:
 
 buildDunePackage rec {
   pname = "mirage-crypto-rng";
 
   inherit (mirage-crypto) version src;
-  duneVersion = "3";
 
   doCheck = true;
   checkInputs = [ ounit2 randomconv ];
 
   buildInputs = [ dune-configurator ];
-  propagatedBuildInputs = [ cstruct mirage-crypto duration logs mtime ];
+  propagatedBuildInputs = [ cstruct mirage-crypto duration logs ];
 
   strictDeps = true;
 
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index ee00fe5cc494..35535adc54f8 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1110,7 +1110,7 @@ let
 
     mirage-crypto-pk = callPackage ../development/ocaml-modules/mirage-crypto/pk.nix { };
 
-    mirage-crypto-rng = callPackage ../development/ocaml-modules/mirage-crypto/rng.nix { mtime = mtime_1; };
+    mirage-crypto-rng = callPackage ../development/ocaml-modules/mirage-crypto/rng.nix { };
 
     mirage-crypto-rng-async = callPackage ../development/ocaml-modules/mirage-crypto/rng-async.nix { };