diff --git a/pkgs/development/python-modules/pysequoia/default.nix b/pkgs/development/python-modules/pysequoia/default.nix
index c35412383016..4e48f1c49dd1 100644
--- a/pkgs/development/python-modules/pysequoia/default.nix
+++ b/pkgs/development/python-modules/pysequoia/default.nix
@@ -11,6 +11,7 @@
 , pcsclite
 , stdenv
 , darwin
+, libiconv
 }:
 
 buildPythonPackage rec {
@@ -46,6 +47,7 @@ buildPythonPackage rec {
   ] ++ lib.optionals stdenv.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.Security
+    libiconv
   ];
 
   pythonImportsCheck = [ "pysequoia" ];
@@ -56,5 +58,7 @@ buildPythonPackage rec {
     homepage = "https://sequoia-pgp.gitlab.io/pysequoia";
     license = licenses.asl20;
     maintainers = with maintainers; [ doronbehar ];
+    # Broken since the 0.1.20 update according to ofborg. The errors are not clear...
+    broken = stdenv.isDarwin;
   };
 }