Merge pull request #241949 from R-VdP/nixos_test_busybox

nixos/test-driver: use the short form argument to base64 for busybox compatibility.

nixos/lib/test-driver/test_driver/machine.py

@@ -583,7 +583,7 @@ class Machine:
         # While sh is bash on NixOS, this is not the case for every distro.
         # We explicitly call bash here to allow for the driver to boot other distros as well.
         out_command = (
-            f"{timeout_str} bash -c {shlex.quote(command)} | (base64 --wrap 0; echo)\n"
+            f"{timeout_str} bash -c {shlex.quote(command)} | (base64 -w 0; echo)\n"
         )
 
         assert self.shell