Add argument to reusable yaml task

[Jens Van de Waarsenburg]

Currently testing out reusable Bamboo yaml files. My main bamboo.yml contains the following: 

Build:
 tasks: !include 'jobs/run-build.yml'
 variables:
  user: Admin

run-build.yml contains the follow:

tasks:
 -
  script:
   interpreter: /bin/sh
   scripts:
     - scripts/build.sh
variables:
user: Default

Now is it possible to pass an argument through run-build and pass that to the scripts/build.sh call?