How to copy current directory into Drupal profile folder via drush? I've this yml file in my current folder:

$ cat profile.yml 
api: 2
core: 7.x
projects:
  drupal7:
    type: "copy"
    download:
      url: "file://."


and 3 empty files (just for now): drupal7.info, drupal7.install, drupal7.profile.

And I've downloaded fresh Drupal:

$ drush -y dl drupal
Project drupal (7.39) downloaded to drupal-7.39.


Now I'm trying to copy my profile into Drupal directory via:

$ drush make --no-core profile.yml drupal-7.39/
Beginning to build profile.yml.
Non-existent project type copy on project drupal7.


and the same with:

$ drush make -r drupal-7.39/ --yes --no-core profile.yml 


This is based on this example:

projects[example][type] = "profile"
projects[example][download][type] = "copy"
projects[example][download][url] = "file://./example"


but I'd like to achieve that in yml format.

What is the correct syntax then? Or how does it work?
I actually had to specify extra type: "profile" (to follow this example), so type is specified twice (type of project, and type of download), as below:

api: 2
core: 7.x
projects:
  drupal7:
    type: "profile"
    download:
      type: "copy"
      url: "file://."


Then this would work fine:

$ drush make --no-core profile.yml drupal-7.39/
Beginning to build profile.yml.
drupal7 copied from file://..              


To avoid copying docroot/ it-self, it's good to actually create a separate folder for profile (as specifying wildcard won't work).