Add defaults for all relevant host_vars

roles/desktop-environment/tasks/config.yml

@@ -33,7 +33,7 @@
       dest: "/etc/systemd/"
     - src: "{{ role_path }}/files/systemd/sleep.conf.d"
       dest: "/etc/systemd/"
-  when: hostvars[ansible_hostname]['mobile_platform']
+  when: "hostvars[ansible_hostname]['mobile_platform'] | default(false)"
 
 - name: Copy static config files
   copy:

roles/desktop-environment/tasks/utils.yml

@@ -39,7 +39,7 @@
     name:
       - brightnessctl
       - network-manager
-  when: hostvars[ansible_hostname]['mobile_platform']
+  when: "hostvars[ansible_hostname]['mobile_platform'] | default(false)"
 
 - name: Install brightnessctl udev rules
   become: yes
@@ -49,7 +49,7 @@
     owner: root
     group: root
     mode: u=rw,g=r,o=r
-  when: hostvars[ansible_hostname]['mobile_platform']
+  when: "hostvars[ansible_hostname]['mobile_platform'] | default(false)"
 
 - name: Install zsh
   become: yes