diff --git a/packages/packages.nix b/packages/packages.nix
index d8ab905..3cae71a 100644
--- a/packages/packages.nix
+++ b/packages/packages.nix
@@ -5,6 +5,9 @@ let
     systems = [ system ];
     config.overridesDirs = [ ./dream2nix-overrides ];
   };
+  poetry2nix = pkgs.poetry2nix.overrideScope' (final: prev: {
+    defaultPoetryOverrides = prev.defaultPoetryOverrides.extend (import ./poetry2nix-overrides);
+  });
 in
 {
   ghost = (dream2nix.riseAndShine {
diff --git a/packages/poetry2nix-overrides/default.nix b/packages/poetry2nix-overrides/default.nix
new file mode 100644
index 0000000..9bc15cf
--- /dev/null
+++ b/packages/poetry2nix-overrides/default.nix
@@ -0,0 +1,7 @@
+final: prev: {
+  py-multibase = prev.py-multibase.overridePythonAttrs (old: {
+    nativeBuildInputs = (old.nativeBuildInputs or []) ++ [
+      final.pytestrunner
+    ];
+  });
+}
\ No newline at end of file