diff --git a/pkgs/development/python-modules/ray/default.nix b/pkgs/development/python-modules/ray/default.nix
index 711e6bd34f35..152f2d946010 100644
--- a/pkgs/development/python-modules/ray/default.nix
+++ b/pkgs/development/python-modules/ray/default.nix
@@ -120,6 +120,7 @@ buildPythonPackage rec {
     "click"
     "grpcio"
     "protobuf"
+    "virtualenv"
   ];
 
   propagatedBuildInputs = [