diff --git a/cmdeploy/src/cmdeploy/lxc/incus.py b/cmdeploy/src/cmdeploy/lxc/incus.py
index ca7df433..740b77d2 100644
--- a/cmdeploy/src/cmdeploy/lxc/incus.py
+++ b/cmdeploy/src/cmdeploy/lxc/incus.py
@@ -128,7 +128,7 @@ class Incus:
         proc = subprocess.Popen(
             cmd,
             text=True,
-            stdin=subprocess.PIPE if input else None,
+            stdin=subprocess.PIPE if input else subprocess.DEVNULL,
             stdout=subprocess.PIPE,
             stderr=subprocess.STDOUT,
         )
diff --git a/cmdeploy/src/cmdeploy/util.py b/cmdeploy/src/cmdeploy/util.py
index 3832202b..83bc5ea9 100644
--- a/cmdeploy/src/cmdeploy/util.py
+++ b/cmdeploy/src/cmdeploy/util.py
@@ -90,6 +90,7 @@ class Out:
             cmd,
             shell=True,
             text=True,
+            stdin=subprocess.DEVNULL,
             stdout=subprocess.PIPE,
             stderr=subprocess.STDOUT,
             env=env,
@@ -133,6 +134,7 @@ def shell(cmd, check=False, **kwargs):
     """
     if "capture_output" not in kwargs and "stdout" not in kwargs:
         kwargs["capture_output"] = True
+    kwargs.setdefault("stdin", subprocess.DEVNULL)
     return subprocess.run(collapse(cmd), shell=True, text=True, check=check, **kwargs)