diff --git a/pkgs/development/python-modules/python-flirt/default.nix b/pkgs/development/python-modules/python-flirt/default.nix
index cbd3de93b6e7..6a8aa431ac4b 100644
--- a/pkgs/development/python-modules/python-flirt/default.nix
+++ b/pkgs/development/python-modules/python-flirt/default.nix
@@ -1,7 +1,9 @@
 { lib
+, stdenv
 , buildPythonPackage
 , fetchFromGitHub
 , rustPlatform
+, libiconv
 }:
 
 buildPythonPackage rec {
@@ -26,6 +28,10 @@ buildPythonPackage rec {
     maturinBuildHook
   ];
 
+  buildInputs = lib.optionals stdenv.isDarwin [
+    libiconv
+  ];
+
   buildAndTestSubdir = "pyflirt";
 
   cargoDeps = rustPlatform.importCargoLock {