diff --git a/pkgs/development/compilers/mlton/20210107-binary.nix b/pkgs/development/compilers/mlton/20210107-binary.nix
new file mode 100644
index 000000000000..26a20db0d391
--- /dev/null
+++ b/pkgs/development/compilers/mlton/20210107-binary.nix
@@ -0,0 +1,60 @@
+{ lib, stdenv, fetchurl, patchelf, gmp }:
+let
+  dynamic-linker = stdenv.cc.bintools.dynamicLinker;
+in
+stdenv.mkDerivation rec {
+  pname = "mlton";
+  version = "20210107";
+
+  src =
+    if stdenv.hostPlatform.system == "x86_64-linux" then
+      (fetchurl {
+        url = "https://github.com/MLton/mlton/releases/download/on-${version}-release/${pname}-${version}-1.amd64-linux-glibc2.31.tgz.tgz";
+        sha256 = "0f4q575yfm5dpg4a2wsnqn4l2zrar96p6rlsk0dw10ggyfwvsjlf";
+      })
+    else if stdenv.hostPlatform.system == "x86_64-darwin" then
+      (fetchurl {
+        url = "https://github.com/MLton/mlton/releases/download/on-${version}-release/${pname}-${version}-1.amd64-darwin-19.6.gmp-static.tgz";
+        sha256 = "1cw7yhw48qp12q0adwf8srpjzrgkp84kmlkqw3pz8vkxz4p9hbdv";
+      })
+    else
+      throw "Architecture not supported";
+
+  buildInputs = [ gmp ];
+  nativeBuildInputs = lib.optional stdenv.isLinux patchelf;
+
+  buildPhase = ''
+    make update \
+      CC="$(type -p cc)" \
+      WITH_GMP_INC_DIR="${gmp.dev}/include" \
+      WITH_GMP_LIB_DIR="${gmp}/lib"
+  '';
+
+  installPhase = ''
+    make install PREFIX=$out
+  '';
+
+  postFixup = lib.optionalString stdenv.isLinux ''
+    patchelf --set-interpreter ${dynamic-linker} $out/lib/mlton/mlton-compile
+    patchelf --set-rpath ${gmp}/lib $out/lib/mlton/mlton-compile
+
+    for e in mllex mlnlffigen mlprof mlyacc; do
+      patchelf --set-interpreter ${dynamic-linker} $out/bin/$e
+      patchelf --set-rpath ${gmp}/lib $out/bin/$e
+    done
+  '' + lib.optionalString stdenv.isDarwin ''
+    install_name_tool -change \
+      /opt/local/lib/libgmp.10.dylib \
+      ${gmp}/lib/libgmp.10.dylib \
+      $out/lib/mlton/mlton-compile
+
+    for e in mllex mlnlffigen mlprof mlyacc; do
+      install_name_tool -change \
+        /opt/local/lib/libgmp.10.dylib \
+        ${gmp}/lib/libgmp.10.dylib \
+        $out/bin/$e
+    done
+  '';
+
+  meta = import ./meta.nix;
+}
diff --git a/pkgs/development/compilers/mlton/default.nix b/pkgs/development/compilers/mlton/default.nix
index e4381774781c..1caeecccaadb 100644
--- a/pkgs/development/compilers/mlton/default.nix
+++ b/pkgs/development/compilers/mlton/default.nix
@@ -1,9 +1,9 @@
 { callPackage }:
 
 rec {
-  mlton20130715 = callPackage ./20130715.nix {};
+  mlton20130715 = callPackage ./20130715.nix { };
 
-  mlton20180207Binary = callPackage ./20180207-binary.nix {};
+  mlton20180207Binary = callPackage ./20180207-binary.nix { };
 
   mlton20180207 = callPackage ./from-git-source.nix {
     mltonBootstrap = mlton20180207Binary;
@@ -12,10 +12,19 @@ rec {
     sha256 = "00rdd2di5x1dzac64il9z05m3fdzicjd3226wwjyynv631jj3q2a";
   };
 
+  mlton20210107Binary = callPackage ./20210107-binary.nix { };
+
+  mlton20210107 = callPackage ./from-git-source.nix {
+    mltonBootstrap = mlton20180207Binary;
+    version = "20210107";
+    rev = "on-20210117-release";
+    sha256 = "sha256-rqL8lnzVVR+5Hc7sWXK8dCXN92dU76qSoii3/4StODM=";
+  };
+
   mltonHEAD = callPackage ./from-git-source.nix {
     mltonBootstrap = mlton20180207Binary;
     version = "HEAD";
-    rev = "e149c9917cfbfe6aba5c986a958ed76d5cc6cfde";
-    sha256 = "0a0j1i0f0fxw2my1309srq5j3vz0kawrrln01gxms2m5hy5dl50d";
+    rev = "875f7912a0b135a9a7e86a04ecac9cacf0bfe5e5";
+    sha256 = "sha256-/MIoVqqv8qrJPehU7VRFpXtAAo8UUzE3waEvB7WnS9A=";
   };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 5f0233302b33..32df3a35196a 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -13523,9 +13523,10 @@ with pkgs;
     mlton20130715
     mlton20180207Binary
     mlton20180207
+    mlton20210107
     mltonHEAD;
 
-  mlton = mlton20180207;
+  mlton = mlton20210107;
 
   mono = mono6;