Sage 10 dev + ACF pro: Unable to resolve installation set of packages

I have a fresh tellis install, and then installed the sage 10 dev branch using:

$ cd site/web/app/themes
$ composer create-project roots/sage my-theme-name dev-10.0.0-dev

I have then added my ACF pro plugin in composer.json:

  "type": "package",
  "package": {
    "name": "advanced-custom-fields/advanced-custom-fields-pro",
    "version": "5.8.4",
    "type": "wordpress-muplugin",
    "dist": {
      "type": "zip",
      "url": ""
    "require": {
      "philippbaschke/acf-pro-installer": "^1.0",
      "composer/installers": "^1.0"

When I try to run composer install, I am getting a lot of conflicts with the dotenv version:

Has anyone managed to get ACF Pro on the Sage 10 branch? any help appreciated.

The ACF installer you’re using hasn’t been updated for some time.

Try using ffraenz instead:


Thank you @ng3 , saved my bacon!

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