diff --git a/pkgs/development/ocaml-modules/caqti/default.nix b/pkgs/development/ocaml-modules/caqti/default.nix
index 5e04b4258bbe..a1a716451f9d 100644
--- a/pkgs/development/ocaml-modules/caqti/default.nix
+++ b/pkgs/development/ocaml-modules/caqti/default.nix
@@ -12,6 +12,8 @@
   mtime,
   ptime,
   uri,
+  stdenv,
+  darwin,
 }:
 
 buildDunePackage rec {
@@ -38,6 +40,8 @@ buildDunePackage rec {
     uri
   ];
 
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.sigtool ];
+
   # Checks depend on caqti-driver-sqlite3 (circural dependency)
   doCheck = false;
 
diff --git a/pkgs/development/ocaml-modules/dream/default.nix b/pkgs/development/ocaml-modules/dream/default.nix
index d35993507938..f7ca3b73e406 100644
--- a/pkgs/development/ocaml-modules/dream/default.nix
+++ b/pkgs/development/ocaml-modules/dream/default.nix
@@ -1,5 +1,4 @@
 {
-  lib,
   buildDunePackage,
   dream-pure,
   lwt_ppx,
@@ -18,14 +17,39 @@
   markup,
   mirage-clock,
   mirage-crypto-rng,
-  mirage-crypto-rng-lwt,
   multipart_form-lwt,
   ssl,
   unstrctrd,
   uri,
   yojson,
+  # for mirage-crypro-rng-lwt 1.2.0
+  # It is removed from mirage-crypto 2.1.0 now.
+  fetchurl,
+  duration,
+  logs,
+  mtime,
+  lwt,
 }:
 
+let
+  mirage-crypto-rng-lwt = buildDunePackage rec {
+    pname = "mirage-crypto-rng-lwt";
+    version = "1.2.0";
+    src = fetchurl {
+      url = "https://github.com/mirage/mirage-crypto/releases/download/v${version}/mirage-crypto-${version}.tbz";
+      hash = "sha256-CVQrzZbB02j/m6iFMQX0wXgdjJTCQA3586wGEO4H5n4=";
+    };
+    doCheck = true;
+    propagatedBuildInputs = [
+      mirage-crypto-rng
+      duration
+      logs
+      mtime
+      lwt
+    ];
+  };
+in
+
 buildDunePackage {
   pname = "dream";
 
diff --git a/pkgs/development/ocaml-modules/dream/httpaf.nix b/pkgs/development/ocaml-modules/dream/httpaf.nix
index 6ba186bceb7a..0b4d8dce6103 100644
--- a/pkgs/development/ocaml-modules/dream/httpaf.nix
+++ b/pkgs/development/ocaml-modules/dream/httpaf.nix
@@ -1,5 +1,4 @@
 {
-  lib,
   buildDunePackage,
   dream-pure,
   lwt_ppx,
diff --git a/pkgs/development/ocaml-modules/mirage-crypto/default.nix b/pkgs/development/ocaml-modules/mirage-crypto/default.nix
index 99c71786d448..a78531277f65 100644
--- a/pkgs/development/ocaml-modules/mirage-crypto/default.nix
+++ b/pkgs/development/ocaml-modules/mirage-crypto/default.nix
@@ -14,11 +14,11 @@ buildDunePackage rec {
   minimalOCamlVersion = "4.13";
 
   pname = "mirage-crypto";
-  version = "1.2.0";
+  version = "2.0.1";
 
   src = fetchurl {
     url = "https://github.com/mirage/mirage-crypto/releases/download/v${version}/mirage-crypto-${version}.tbz";
-    hash = "sha256-CVQrzZbB02j/m6iFMQX0wXgdjJTCQA3586wGEO4H5n4=";
+    hash = "sha256-VDDOPD5AYn0tZ6jez1ZaH2EtOb2zP5t2fDvbYB/1oZY=";
   };
 
   doCheck = true;
@@ -36,14 +36,18 @@ buildDunePackage rec {
       ocaml-freestanding
     ];
 
-  meta = with lib; {
+  meta = {
     homepage = "https://github.com/mirage/mirage-crypto";
     description = "Simple symmetric cryptography for the modern age";
-    license = [
-      licenses.isc # default license
-      licenses.bsd2 # mirage-crypto-rng-mirage
-      licenses.mit # mirage-crypto-ec
+    changelog = "https://raw.githubusercontent.com/mirage/mirage-crypto/refs/tags/v${version}/CHANGES.md";
+    license = with lib.licenses; [
+      isc # default license
+      bsd2 # mirage-crypto-rng-mirage
+      mit # mirage-crypto-ec
+    ];
+    maintainers = with lib.maintainers; [
+      sternenseemann
+      momeemt
     ];
-    maintainers = with maintainers; [ sternenseemann ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/mirage-crypto/rng-async.nix b/pkgs/development/ocaml-modules/mirage-crypto/rng-async.nix
deleted file mode 100644
index b5d5acc232ac..000000000000
--- a/pkgs/development/ocaml-modules/mirage-crypto/rng-async.nix
+++ /dev/null
@@ -1,33 +0,0 @@
-{
-  buildDunePackage,
-  mirage-crypto,
-  mirage-crypto-rng,
-  dune-configurator,
-  async,
-  logs,
-  ohex,
-}:
-
-buildDunePackage {
-  pname = "mirage-crypto-rng-async";
-
-  inherit (mirage-crypto) version src;
-
-  buildInputs = [
-    dune-configurator
-  ];
-
-  propagatedBuildInputs = [
-    async
-    logs
-    mirage-crypto
-    mirage-crypto-rng
-  ];
-
-  doCheck = true;
-  checkInputs = [ ohex ];
-
-  meta = mirage-crypto.meta // {
-    description = "Feed the entropy source in an Async-friendly way";
-  };
-}
diff --git a/pkgs/development/ocaml-modules/mirage-crypto/rng-eio.nix b/pkgs/development/ocaml-modules/mirage-crypto/rng-eio.nix
deleted file mode 100644
index c36dd79745ce..000000000000
--- a/pkgs/development/ocaml-modules/mirage-crypto/rng-eio.nix
+++ /dev/null
@@ -1,26 +0,0 @@
-{
-  buildDunePackage,
-  mirage-crypto-rng,
-  eio,
-  eio_main,
-  ohex,
-}:
-
-buildDunePackage {
-  pname = "mirage-crypto-rng-eio";
-
-  inherit (mirage-crypto-rng) version src;
-
-  doCheck = true;
-  checkInputs = [
-    eio_main
-    ohex
-  ];
-
-  propagatedBuildInputs = [
-    mirage-crypto-rng
-    eio
-  ];
-
-  meta = mirage-crypto-rng.meta;
-}
diff --git a/pkgs/development/ocaml-modules/mirage-crypto/rng-lwt.nix b/pkgs/development/ocaml-modules/mirage-crypto/rng-lwt.nix
deleted file mode 100644
index d36595708a9d..000000000000
--- a/pkgs/development/ocaml-modules/mirage-crypto/rng-lwt.nix
+++ /dev/null
@@ -1,26 +0,0 @@
-{
-  buildDunePackage,
-  mirage-crypto-rng,
-  duration,
-  logs,
-  mtime,
-  lwt,
-}:
-
-buildDunePackage {
-  pname = "mirage-crypto-rng-lwt";
-
-  inherit (mirage-crypto-rng) version src;
-
-  doCheck = true;
-
-  propagatedBuildInputs = [
-    mirage-crypto-rng
-    duration
-    logs
-    mtime
-    lwt
-  ];
-
-  meta = mirage-crypto-rng.meta;
-}
diff --git a/pkgs/development/ocaml-modules/mirage-crypto/rng-miou-unix.nix b/pkgs/development/ocaml-modules/mirage-crypto/rng-miou-unix.nix
new file mode 100644
index 000000000000..ec4d18a9597f
--- /dev/null
+++ b/pkgs/development/ocaml-modules/mirage-crypto/rng-miou-unix.nix
@@ -0,0 +1,39 @@
+{
+  buildDunePackage,
+  mirage-crypto-rng,
+  miou,
+  logs,
+  duration,
+  mtime,
+  digestif,
+  ohex,
+}:
+
+buildDunePackage {
+  pname = "mirage-crypto-rng-miou-unix";
+
+  inherit (mirage-crypto-rng) version src;
+
+  doCheck = true;
+  checkInputs = [
+
+  ];
+
+  propagatedBuildInputs = [
+    miou
+    logs
+    mirage-crypto-rng
+    duration
+    mtime
+    digestif
+    ohex
+  ];
+
+  meta = mirage-crypto-rng.meta // {
+    description = "Feed the entropy source in an miou.unix-friendly way";
+    longDescription = ''
+      Mirage-crypto-rng-miou-unix feeds the entropy source for Mirage_crypto_rng-based
+      random number generator implementations, in an miou.unix-friendly way.
+    '';
+  };
+}
diff --git a/pkgs/development/ocaml-modules/mirage-crypto/rng-mirage.nix b/pkgs/development/ocaml-modules/mirage-crypto/rng-mirage.nix
index 8265808c5732..b974a6adc0f7 100644
--- a/pkgs/development/ocaml-modules/mirage-crypto/rng-mirage.nix
+++ b/pkgs/development/ocaml-modules/mirage-crypto/rng-mirage.nix
@@ -3,8 +3,8 @@
   mirage-crypto-rng,
   duration,
   mirage-runtime,
-  mirage-time,
-  mirage-clock,
+  mirage-mtime,
+  mirage-sleep,
   mirage-unix,
   mirage-time-unix,
   mirage-clock-unix,
@@ -30,8 +30,8 @@ buildDunePackage {
     duration
     mirage-crypto-rng
     mirage-runtime
-    mirage-time
-    mirage-clock
+    mirage-mtime
+    mirage-sleep
     logs
     lwt
   ];
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 5cbe2995ad1b..506c88df82cd 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1308,16 +1308,14 @@ let
 
         mirage-crypto-rng = callPackage ../development/ocaml-modules/mirage-crypto/rng.nix { };
 
-        mirage-crypto-rng-async = callPackage ../development/ocaml-modules/mirage-crypto/rng-async.nix { };
-
-        mirage-crypto-rng-eio = callPackage ../development/ocaml-modules/mirage-crypto/rng-eio.nix { };
-
-        mirage-crypto-rng-lwt = callPackage ../development/ocaml-modules/mirage-crypto/rng-lwt.nix { };
-
         mirage-crypto-rng-mirage =
           callPackage ../development/ocaml-modules/mirage-crypto/rng-mirage.nix
             { };
 
+        mirage-crypto-rng-miou-unix =
+          callPackage ../development/ocaml-modules/mirage-crypto/rng-miou-unix.nix
+            { };
+
         mirage-device = callPackage ../development/ocaml-modules/mirage-device { };
 
         mirage-flow = callPackage ../development/ocaml-modules/mirage-flow { };