From 44ff5e3ce636206c84c5ff2cbad618754afa24dd Mon Sep 17 00:00:00 2001
From: Victor Freire <victor@freire.dev.br>
Date: Mon, 15 Dec 2025 16:59:55 -0300
Subject: [PATCH 1/2] mlton: mlton20210117 -> mlton20241230

---
 pkgs/development/compilers/mlton/default.nix         | 11 ++++++++++-
 pkgs/development/compilers/mlton/from-git-source.nix |  5 ++---
 pkgs/top-level/all-packages.nix                      |  3 ++-
 3 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/pkgs/development/compilers/mlton/default.nix b/pkgs/development/compilers/mlton/default.nix
index a74d1d85455b..cc6559f07916 100644
--- a/pkgs/development/compilers/mlton/default.nix
+++ b/pkgs/development/compilers/mlton/default.nix
@@ -1,4 +1,4 @@
-{ callPackage }:
+{ callPackage, stdenv }:
 
 rec {
   mlton20130715 = callPackage ./20130715.nix { };
@@ -21,6 +21,15 @@ rec {
     sha256 = "sha256-rqL8lnzVVR+5Hc7sWXK8dCXN92dU76qSoii3/4StODM=";
   };
 
+  mlton20241230 = callPackage ./from-git-source.nix {
+    mltonBootstrap = mlton20210117Binary;
+    version = "20241230";
+    rev = "on-20241230-release";
+    sha256 = "sha256-gJUzav2xH8C4Vy5FuqN73Z6lPMSPQgJApF8LgsJXRWo=";
+    # https://github.com/MLton/mlton/issues/631
+    doCheck = !(stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isDarwin);
+  };
+
   mltonHEAD = callPackage ./from-git-source.nix {
     mltonBootstrap = mlton20210117Binary;
     version = "HEAD";
diff --git a/pkgs/development/compilers/mlton/from-git-source.nix b/pkgs/development/compilers/mlton/from-git-source.nix
index 91735196c1c7..a8e7c61f5334 100644
--- a/pkgs/development/compilers/mlton/from-git-source.nix
+++ b/pkgs/development/compilers/mlton/from-git-source.nix
@@ -9,11 +9,12 @@
   stdenv,
   version,
   which,
+  doCheck ? true,
 }:
 
 stdenv.mkDerivation {
   pname = "mlton";
-  inherit version;
+  inherit version doCheck;
 
   src = fetchgit {
     inherit url rev sha256;
@@ -44,7 +45,5 @@ stdenv.mkDerivation {
       )
   '';
 
-  doCheck = true;
-
   meta = import ./meta.nix { inherit lib; };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 48dc7cff6d71..77b7a7ae9df6 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5011,10 +5011,11 @@ with pkgs;
     mlton20180207Binary
     mlton20180207
     mlton20210117
+    mlton20241230
     mltonHEAD
     ;
 
-  mlton = mlton20210117;
+  mlton = mlton20241230;
 
   mono = mono6;
 

From 362f9770d9c3338bb9183d5eba2bfa49d336d5bf Mon Sep 17 00:00:00 2001
From: Victor Freire <victor@freire.dev.br>
Date: Mon, 15 Dec 2025 17:00:34 -0300
Subject: [PATCH 2/2] mltonHEAD: 875f7912a0b135a9a7e86a04ecac9cacf0bfe5e5 ->
 61baac7108fbd91413f0537b7a42d9a1023455f4

---
 pkgs/development/compilers/mlton/default.nix | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/compilers/mlton/default.nix b/pkgs/development/compilers/mlton/default.nix
index cc6559f07916..91d70e431ff3 100644
--- a/pkgs/development/compilers/mlton/default.nix
+++ b/pkgs/development/compilers/mlton/default.nix
@@ -33,7 +33,9 @@ rec {
   mltonHEAD = callPackage ./from-git-source.nix {
     mltonBootstrap = mlton20210117Binary;
     version = "HEAD";
-    rev = "875f7912a0b135a9a7e86a04ecac9cacf0bfe5e5";
-    sha256 = "sha256-/MIoVqqv8qrJPehU7VRFpXtAAo8UUzE3waEvB7WnS9A=";
+    rev = "61baac7108fbd91413f0537b7a42d9a1023455f4";
+    sha256 = "sha256-nWR7ZaXfKxeXfZ9IHipAQ39ASVtva4BeDHP3Zq8mqPo=";
+    # https://github.com/MLton/mlton/issues/631
+    doCheck = !(stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isDarwin);
   };
 }