diff --git a/support/build/README.md b/support/build/README.md
index c96f9459f..635fbebf1 100644
--- a/support/build/README.md
+++ b/support/build/README.md
@@ -252,9 +252,9 @@ A manifest looks roughly like this (example is for `ext-apcu/5.1.17` for PHP 7.3
 
 *Example: `curl -s https://lang-php.s3.amazonaws.com/dist-heroku-18-stable/packages.json | jq '[ .packages[][] | select(.type == "heroku-sys-php-extension" and .name == "heroku-sys/ext-apcu") ] | .[0]'`*
 
-Package `name`s must be prefixed with "`heroku-sys/`". Possible `type`s are `heroku-sys-php`, `heroku-sys-hhvm`, `heroku-sys-php-extension` or `heroku-sys-webserver`. The `dist` type must be "`heroku-sys-tar`". If the package is a `heroku-sys-php-extension`, it's important to specify a `conflict` with "`heroku-sys/hhvm`".
+Package `name`s must be prefixed with "`heroku-sys/`". Possible `type`s are `heroku-sys-php`, `heroku-sys-hhvm`, `heroku-sys-library`, `heroku-sys-php-extension`, `heroku-sys-program` or `heroku-sys-webserver`. The `dist` type must be "`heroku-sys-tar`". If the package is a `heroku-sys-php-extension`, it's important to specify a `conflict` with "`heroku-sys/hhvm`".
 
-The special package type `heroku-sys-php-package` is used for generic packages that should not be available to applications during app deploys (such as vendored libraries used to build PHP or an extension).
+The special package type `heroku-sys-package` is used for internal packages used for bootstrapping (e.g. a minimal PHP build).
 
 The `require`d package `heroku/installer-plugin` will be available during install. Package `heroku-sys/heroku` is a virtual package `provide`d by the platform `composer.json` generated in `bin/compile` and has the right stack version (either "`16`" or "`18`"); the selector for `heroku-sys/php` ensures that the package only applies to PHP 7.0.x.
 
@@ -339,6 +339,7 @@ The `type` of a package must be one of the following:
 - 'heroku-sys-library', for a system library
 - 'heroku-sys-php', for a PHP runtime
 - 'heroku-sys-php-extension', for a PHP extension
+- 'heroku-sys-program', for executable utilities etc
 - 'heroku-sys-webserver', for a web server
 
 #### Dist Type and URL
diff --git a/support/build/_util/include/manifest.py b/support/build/_util/include/manifest.py
index 42cf7f34a..8ee6c341e 100644
--- a/support/build/_util/include/manifest.py
+++ b/support/build/_util/include/manifest.py
@@ -7,6 +7,8 @@
 require["heroku/installer-plugin"] = "^1.2.0"
 if sys.argv[1] == 'heroku-sys-library':
 	require["heroku/installer-plugin"] = "^1.3.0"
+elif sys.argv[1] == 'heroku-sys-program':
+	require["heroku/installer-plugin"] = "^1.4.0"
 
 manifest = {
 	"type": sys.argv[1],
diff --git a/support/installer/composer.json b/support/installer/composer.json
index 646713608..178284182 100644
--- a/support/installer/composer.json
+++ b/support/installer/composer.json
@@ -1,7 +1,7 @@
 {
 	"type": "composer-plugin",
 	"name": "heroku/installer-plugin",
-	"version": "1.3.0",
+	"version": "1.4.0",
 	"autoload": {
 		"psr-4": {
 			"Heroku\\Buildpack\\PHP\\": "src/"
diff --git a/support/installer/src/ComposerInstaller.php b/support/installer/src/ComposerInstaller.php
index e668abf13..f95c421b9 100644
--- a/support/installer/src/ComposerInstaller.php
+++ b/support/installer/src/ComposerInstaller.php
@@ -22,6 +22,7 @@ public function supports($packageType)
 			'heroku-sys-library',
 			'heroku-sys-php',
 			'heroku-sys-php-extension',
+			'heroku-sys-program',
 			'heroku-sys-webserver',
 		]);
 	}
diff --git a/support/installer/src/ComposerInstallerPlugin.php b/support/installer/src/ComposerInstallerPlugin.php
index c94faeba7..2e35f1a16 100644
--- a/support/installer/src/ComposerInstallerPlugin.php
+++ b/support/installer/src/ComposerInstallerPlugin.php
@@ -57,7 +57,7 @@ public static function getSubscribedEvents()
 
 	public function onPostPackageInstall(PackageEvent $event)
 	{
-		if(!in_array($event->getOperation()->getPackage()->getType(), ['heroku-sys-php', 'heroku-sys-hhvm', 'heroku-sys-php-extension', 'heroku-sys-hhvm-extension', 'heroku-sys-webserver', 'heroku-sys-library'])) return;
+		if(!in_array($event->getOperation()->getPackage()->getType(), ['heroku-sys-php', 'heroku-sys-hhvm', 'heroku-sys-php-extension', 'heroku-sys-hhvm-extension', 'heroku-sys-webserver', 'heroku-sys-library', 'heroku-sys-program'])) return;
 		
 		$this->initAllPlatformRequirements($event->getOperations());