diff --git a/lib/runners/stratovirt.nix b/lib/runners/stratovirt.nix
index 0cb93860..3d3dec31 100644
--- a/lib/runners/stratovirt.nix
+++ b/lib/runners/stratovirt.nix
@@ -69,6 +69,7 @@ in {
 
   command = lib.escapeShellArgs (
     [
+      "${pkgs.expect}/bin/unbuffer"
       "${pkgs.stratovirt}/bin/stratovirt"
       "-name" hostName
       "-machine" machine