diff --git a/pkgs/development/python-modules/pdoc-pyo3-sample-library/default.nix b/pkgs/development/python-modules/pdoc-pyo3-sample-library/default.nix
index f02507574b9a..37fd1d1378dc 100644
--- a/pkgs/development/python-modules/pdoc-pyo3-sample-library/default.nix
+++ b/pkgs/development/python-modules/pdoc-pyo3-sample-library/default.nix
@@ -1,9 +1,11 @@
 { lib
+, stdenv
 , buildPythonPackage
 , fetchPypi
 , rustPlatform
 , cargo
 , rustc
+, libiconv
 }:
 
 buildPythonPackage rec {
@@ -29,6 +31,10 @@ buildPythonPackage rec {
     rustc
   ];
 
+  buildInputs = lib.optionals stdenv.isDarwin [
+    libiconv
+  ];
+
   pythonImportsCheck = [ "pdoc_pyo3_sample_library" ];
 
   # no tests