- hosts: all
  tasks:
    - name: Check for tools
      command: type make git bzip2
      failed_when: false
      register: _tools

    - name: Install tools
      package:
        name:
          - git
          - bzip2
          - make
      become: true
      when: _tools.rc != 0

    - name: Check for dhall command
      command: type -p dhall-to-json
      failed_when: false
      register: _dhall_tools

    - name: Install dhall
      include_role:
        name: ensure-dhall
      when: _dhall_tools.rc != 0