diff --git a/pkgs/development/python-modules/libagent/default.nix b/pkgs/development/python-modules/libagent/default.nix
index 5318142fe70..84c0a613854 100644
--- a/pkgs/development/python-modules/libagent/default.nix
+++ b/pkgs/development/python-modules/libagent/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchPypi, buildPythonPackage, ed25519, ecdsa
-, semver, keepkey, trezor, mnemonic, ledgerblue
+, semver, keepkey, trezor, mnemonic, ledgerblue, unidecode
 }:
 
 buildPythonPackage rec {
@@ -17,6 +17,10 @@ buildPythonPackage rec {
     trezor mnemonic ledgerblue
   ];
 
+  propagatedBuildInputs = [
+    unidecode
+  ];
+
   meta = with stdenv.lib; {
     description = "Using hardware wallets as SSH/GPG agent";
     homepage = https://github.com/romanz/trezor-agent;