diff --git a/pkgs/development/python-modules/bambi/default.nix b/pkgs/development/python-modules/bambi/default.nix
new file mode 100644
index 000000000000..c15c3117b69b
--- /dev/null
+++ b/pkgs/development/python-modules/bambi/default.nix
@@ -0,0 +1,56 @@
+{ lib
+, buildPythonPackage
+, pythonOlder
+, fetchFromGitHub
+, pytestCheckHook
+, arviz
+, formulae
+, graphviz
+, numpy
+, pandas
+, pymc
+, scipy
+}:
+
+buildPythonPackage rec {
+  pname = "bambi";
+  version = "0.9.3";
+  disabled = pythonOlder "3.8";
+
+  src = fetchFromGitHub {
+    owner = "bambinos";
+    repo = pname;
+    rev = "refs/tags/${version}";
+    hash = "sha256-f/4CrFmma+Lc6wZm+YyDupDWfPAtuRsZdRf28sYUWTk=";
+  };
+
+  propagatedBuildInputs = [
+    arviz
+    formulae
+    numpy
+    pandas
+    pymc
+    scipy
+  ];
+
+  preCheck = ''export HOME=$(mktemp -d)'';
+
+  nativeCheckInputs = [ graphviz pytestCheckHook ];
+  disabledTests = [
+    # attempt to fetch data:
+    "test_data_is_copied"
+    "test_predict_offset"
+    # require blackjax (not in Nixpkgs), numpyro, and jax:
+    "test_logistic_regression_categoric_alternative_samplers"
+    "test_regression_alternative_samplers"
+  ];
+
+  pythonImportsCheck = [ "bambi" ];
+
+  meta = with lib; {
+    homepage = "https://bambinos.github.io/bambi";
+    description = "High-level Bayesian model-building interface";
+    license = licenses.mit;
+    maintainers = with maintainers; [ bcdarwin ];
+  };
+}
diff --git a/pkgs/development/python-modules/formulae/default.nix b/pkgs/development/python-modules/formulae/default.nix
new file mode 100644
index 000000000000..9755fed90238
--- /dev/null
+++ b/pkgs/development/python-modules/formulae/default.nix
@@ -0,0 +1,43 @@
+{ lib
+, buildPythonPackage
+, pythonOlder
+, fetchFromGitHub
+, pytestCheckHook
+, numpy
+, pandas
+, scipy
+}:
+
+buildPythonPackage rec {
+  pname = "formulae";
+  version = "0.3.4";
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "bambinos";
+    repo = pname;
+    rev = "refs/tags/v${version}";
+    hash = "sha256-6IGTn3griooslN6+qRYLJiWaJhvsxa1xj1+1kQ57yN0=";
+  };
+
+  propagatedBuildInputs = [
+    numpy
+    pandas
+    scipy
+  ];
+
+  nativeCheckInputs = [ pytestCheckHook ];
+  # use assertions of form `assert pytest.approx(...)`, which is now disallowed:
+  disabledTests = [ "test_basic" "test_degree" ];
+  pythonImportsCheck = [
+    "formulae"
+    "formulae.matrices"
+  ];
+
+  meta = with lib; {
+    homepage = "https://bambinos.github.io/formulae";
+    description = "Formulas for mixed-effects models in Python";
+    license = licenses.mit;
+    maintainers = with maintainers; [ bcdarwin ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 915f5d14a546..7c55959b6149 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -1101,6 +1101,8 @@ self: super: with self; {
 
   babelgladeextractor = callPackage ../development/python-modules/babelgladeextractor { };
 
+  bambi = callPackage ../development/python-modules/bambi { };
+
   pad4pi = callPackage ../development/python-modules/pad4pi { };
 
   pulumi = callPackage ../development/python-modules/pulumi { inherit (pkgs) pulumi; };
@@ -3571,6 +3573,8 @@ self: super: with self; {
 
   formbox = callPackage ../development/python-modules/formbox { };
 
+  formulae = callPackage ../development/python-modules/formulae { };
+
   fortiosapi = callPackage ../development/python-modules/fortiosapi { };
 
   FormEncode = callPackage ../development/python-modules/FormEncode { };