diff --git a/pkgs/development/compilers/rml/default.nix b/pkgs/development/compilers/rml/default.nix
new file mode 100644
index 000000000000..7eebf8a622b4
--- /dev/null
+++ b/pkgs/development/compilers/rml/default.nix
@@ -0,0 +1,36 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, ocamlPackages
+}:
+
+stdenv.mkDerivation rec {
+  pname = "rml";
+  version = "1.09.07";
+
+  src = fetchFromGitHub {
+    owner = "reactiveml";
+    repo = pname;
+    rev = "${pname}-${version}-2021-07-26";
+    hash = "sha256-UFqXQBeIQMSV4O439j9s06p1hh7xA98Tu79FsjK9PIY=";
+  };
+
+  nativeBuildInputs = with ocamlPackages; [
+    ocaml
+  ];
+
+  buildInputs = with ocamlPackages; [
+    num
+  ];
+
+  configureFlags = [ "--prefix" "${placeholder "out"}" ];
+
+  dontAddPrefix = true;
+
+  meta = with lib; {
+    description = "ReactiveML: a programming language for implementing interactive systems";
+    homepage = "https://rml.lri.fr";
+    license = with licenses; [ qpl lgpl21Plus ];
+    maintainers = with maintainers; [ wegank ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index aa0c6b4c803a..bc27df262198 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -14928,6 +14928,8 @@ with pkgs;
 
   rgbds = callPackage ../development/compilers/rgbds { };
 
+  rml = callPackage ../development/compilers/rml { };
+
   composable_kernel = callPackage ../development/libraries/composable_kernel {
     inherit (llvmPackages) openmp;
   };