diff --git a/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/models.py b/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/models.py
index c3a285ebc24f..1910e2681bfd 100644
--- a/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/models.py
+++ b/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/models.py
@@ -94,7 +94,7 @@ class Flake:
                 try:
                     return run_wrapper(
                         ["uname", "-n"],
-                        capture_output=True,
+                        stdout=subprocess.PIPE,
                         remote=target_host,
                     ).stdout.strip()
                 except (AttributeError, subprocess.CalledProcessError):