diff --git a/pkgs/development/python-modules/rlax/default.nix b/pkgs/development/python-modules/rlax/default.nix
new file mode 100644
index 000000000000..adff2f0ac5d3
--- /dev/null
+++ b/pkgs/development/python-modules/rlax/default.nix
@@ -0,0 +1,65 @@
+{ lib
+, fetchPypi
+, buildPythonPackage
+, chex
+, jaxlib
+, tensorflow-probability
+, optax
+, dm-haiku
+, bsuite
+, frozendict
+, pytestCheckHook
+, dm-env
+, distrax }:
+
+buildPythonPackage rec {
+  pname = "rlax";
+  version = "0.1.2";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-hAG0idz5VkGVvxaJWoxlVZ8myeHF6ndDxB0SyJm7qV8=";
+  };
+
+  buildInputs = [
+    chex
+    jaxlib
+    distrax
+    tensorflow-probability
+  ];
+
+  checkInputs = [
+    bsuite
+    dm-env
+    dm-haiku
+    frozendict
+    optax
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "rlax"
+  ];
+
+  disabledTests = [
+    # RuntimeErrors
+    "test_cross_replica_scatter_add0"
+    "test_cross_replica_scatter_add1"
+    "test_cross_replica_scatter_add2"
+    "test_cross_replica_scatter_add3"
+    "test_cross_replica_scatter_add4"
+    "test_learn_scale_shift"
+    "test_normalize_unnormalize_is_identity"
+    "test_outputs_preserved"
+    "test_scale_bounded"
+    "test_slow_update"
+    "test_unnormalize_linear"
+  ];
+
+  meta = with lib; {
+    description = "Library of reinforcement learning building blocks in JAX";
+    homepage = "https://github.com/deepmind/rlax";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ onny ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 2231b5cfa889..36ea5f508a17 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -9345,6 +9345,8 @@ in {
 
   rki-covid-parser = callPackage ../development/python-modules/rki-covid-parser { };
 
+  rlax = callPackage ../development/python-modules/rlax { };
+
   rl-coach = callPackage ../development/python-modules/rl-coach { };
 
   rlp = callPackage ../development/python-modules/rlp { };