GYP product_dir with dependencies

dep.gyp

{
  "includes": [ "../include.gypi" ],
  "targets": [
    {
      "target_name": "foobar",
      "type": "executable",
      "sources": [ "hello.c" ]
    }
  ]
}

hello.c

int main(int argc, char **argv) { return 0; }

include.gypi

{
  "target_defaults": {
    "product_dir": "products"
  }
}

project.gyp

{
  "targets": [
    {
      "target_name": "meta",
      "type": "none",
      "dependencies": [ "subdir/dep.gyp:foobar" ]
    }
  ]
}