Create file in a different way

ignition/base.bu

@@ -17,6 +17,9 @@ storage:
           days = [ "Sat","Sun" ]
           start_time = "06:00"
           length_minutes = 60
+    - path: /etc/issue.d/35-ssh-blocked.issue
+      contents:
+        inline: SSH currently disabled until configuration completes
 
 systemd:
   units:
@@ -35,8 +38,6 @@ systemd:
         RemainAfterExit=yes
         #ExecStart=/usr/bin/systemctl stop sshd
         #ExecStart=/usr/bin/systemctl disable sshd
-        ExecStart=bin/sh -c "/usr/bin/echo SSH currently disabled until configuration completes | /usr/bin/tee /etc/issue.d/35-ssh-blocked.issue"
-        ExecStart=/usr/bin/systemctl restart getty@tty1
         ExecStart=/usr/bin/touch /var/lib/%N.stamp
 
         [Install]

ignition/base.ign

@@ -17,13 +17,20 @@
           "compression": "",
           "source": "data:;base64,W3VwZGF0ZXNdCnN0cmF0ZWd5ID0gInBlcmlvZGljIgpbW3VwZGF0ZXMucGVyaW9kaWMud2luZG93XV0KZGF5cyA9IFsgIlNhdCIsIlN1biIgXQpzdGFydF90aW1lID0gIjA2OjAwIgpsZW5ndGhfbWludXRlcyA9IDYwCg=="
         }
+      },
+      {
+        "path": "/etc/issue.d/35-ssh-blocked.issue",
+        "contents": {
+          "compression": "",
+          "source": "data:,SSH%20currently%20disabled%20until%20configuration%20completes"
+        }
       }
     ]
   },
   "systemd": {
     "units": [
       {
-        "contents": "[Unit]\nDescription=Block SSH during configuration\nAfter=network-online.target\nBefore=zincati.service\nConditionPathExists=!/var/lib/%N.stamp\n\n[Service]\nType=oneshot\nRemainAfterExit=yes\n#ExecStart=/usr/bin/systemctl stop sshd\n#ExecStart=/usr/bin/systemctl disable sshd\nExecStart=bin/sh -c \"/usr/bin/echo SSH currently disabled until configuration completes | /usr/bin/tee /etc/issue.d/35-ssh-blocked.issue\"\nExecStart=/usr/bin/systemctl restart getty@tty1\nExecStart=/usr/bin/touch /var/lib/%N.stamp\n\n[Install]\nWantedBy=multi-user.target\n",
+        "contents": "[Unit]\nDescription=Block SSH during configuration\nAfter=network-online.target\nBefore=zincati.service\nConditionPathExists=!/var/lib/%N.stamp\n\n[Service]\nType=oneshot\nRemainAfterExit=yes\n#ExecStart=/usr/bin/systemctl stop sshd\n#ExecStart=/usr/bin/systemctl disable sshd\nExecStart=/usr/bin/touch /var/lib/%N.stamp\n\n[Install]\nWantedBy=multi-user.target\n",
         "enabled": true,
         "name": "ignition-start-config.service"
       },