Drush Make : Pulling in a local profile archive??

Hi All,

I am sure this is simple but I can't seem to crack it..

I have created a custom installation profile that includes a .make file.. I have archived the profile so now have a tar.gz file..

I now want to create a complete distribution including the custom profile..

My make file to create the build is as below.. (obviously it doesn't work because I don't know the correct syntax for pulling in a local file)

#

core = 7.x

api = 2
projects[] = drupal

projects[custom][type] = profile
projects[custom][download][type] = file
projects[custom][download][url] = file:///websites/make_files/custom.tar.gz

#

Can someone tell me what the correct syntax is for pulling in a local file?

Thanks..