Index: src/launch.c
===================================================================
--- src/launch.c.orig
+++ src/launch.c
@@ -521,10 +521,7 @@ launch_appliance (guestfs_h *g)
      * since it falls back through various different acceleration
      * modes, so try that first (thanks Markus Armbruster).
      */
-    if (qemu_supports (g, "-machine")) {
-      add_cmdline (g, "-machine");
-      add_cmdline (g, "accel=kvm:tcg");
-    } else {
+    if (1) {
       /* qemu sometimes needs this option to enable hardware
        * virtualization, but some versions of 'qemu-kvm' will use KVM
        * regardless (even where this option appears in the help text).