diff --git a/pkgs/by-name/wy/wyoming-piper/package.nix b/pkgs/by-name/wy/wyoming-piper/package.nix
index 28d417db6c5c..e32c5689a98c 100644
--- a/pkgs/by-name/wy/wyoming-piper/package.nix
+++ b/pkgs/by-name/wy/wyoming-piper/package.nix
@@ -21,6 +21,7 @@ python3Packages.buildPythonApplication rec {
   ];
 
   pythonRelaxDeps = [
+    "regex"
     "wyoming"
   ];