diff --git a/src/Flame/Composer/Manager.php b/src/Flame/Composer/Manager.php
index 381aea6b..3fad41e4 100644
--- a/src/Flame/Composer/Manager.php
+++ b/src/Flame/Composer/Manager.php
@@ -269,6 +269,12 @@ protected function restoreComposerFiles(): void
 
     protected function getProcess(array $command, array $env = []): Process
     {
+        foreach (['HOME', 'COMPOSER_HOME'] as $key) {
+            if (!isset($env[$key]) && !getenv($key)) {
+                $env[$key] = $this->storagePath;
+            }
+        }
+
         return (new Process($command, $this->workingPath, $env))->setTimeout(null);
     }
 
diff --git a/tests/src/Flame/Composer/ManagerTest.php b/tests/src/Flame/Composer/ManagerTest.php
index 82a9393a..14a5b508 100644
--- a/tests/src/Flame/Composer/ManagerTest.php
+++ b/tests/src/Flame/Composer/ManagerTest.php
@@ -8,8 +8,10 @@
 use Exception;
 use Igniter\Flame\Composer\Manager;
 use Igniter\Flame\Support\Facades\File;
+use ReflectionMethod;
 use RuntimeException;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Process\Process;
 
 it('loads package version correctly', function() {
     $version = resolve(Manager::class)->getPackageVersion('some-package');
@@ -267,3 +269,69 @@
     $manager = new Manager(__DIR__, '/storage');
     expect(fn() => $manager->assertSchema())->toThrow(RuntimeException::class);
 });
+
+it('injects HOME and COMPOSER_HOME when the parent process has neither set', function() {
+    $originalHome = getenv('HOME');
+    $originalComposerHome = getenv('COMPOSER_HOME');
+    putenv('HOME');
+    putenv('COMPOSER_HOME');
+
+    try {
+        $manager = new Manager('/root', '/storage');
+        $method = new ReflectionMethod(Manager::class, 'getProcess');
+        $method->setAccessible(true);
+
+        /** @var Process $process */
+        $process = $method->invoke($manager, ['composer', 'install'], ['COMPOSER_MEMORY_LIMIT' => '-1']);
+
+        expect($process)->toBeInstanceOf(Process::class)
+            ->and($process->getEnv())->toMatchArray([
+                'HOME' => '/storage',
+                'COMPOSER_HOME' => '/storage',
+                'COMPOSER_MEMORY_LIMIT' => '-1',
+            ]);
+    } finally {
+        $originalHome === false ? putenv('HOME') : putenv('HOME='.$originalHome);
+        $originalComposerHome === false ? putenv('COMPOSER_HOME') : putenv('COMPOSER_HOME='.$originalComposerHome);
+    }
+});
+
+it('does not override HOME or COMPOSER_HOME inherited from the parent process', function() {
+    $originalHome = getenv('HOME');
+    $originalComposerHome = getenv('COMPOSER_HOME');
+    putenv('HOME=/parent/home');
+    putenv('COMPOSER_HOME=/parent/composer');
+
+    try {
+        $manager = new Manager('/root', '/storage');
+        $method = new ReflectionMethod(Manager::class, 'getProcess');
+        $method->setAccessible(true);
+
+        /** @var Process $process */
+        $process = $method->invoke($manager, ['composer', 'install']);
+
+        expect($process->getEnv())
+            ->not->toHaveKey('HOME')
+            ->and($process->getEnv())->not->toHaveKey('COMPOSER_HOME');
+    } finally {
+        $originalHome === false ? putenv('HOME') : putenv('HOME='.$originalHome);
+        $originalComposerHome === false ? putenv('COMPOSER_HOME') : putenv('COMPOSER_HOME='.$originalComposerHome);
+    }
+});
+
+it('allows callers to override HOME and COMPOSER_HOME on the spawned composer process', function() {
+    $manager = new Manager('/root', '/storage');
+    $method = new ReflectionMethod(Manager::class, 'getProcess');
+    $method->setAccessible(true);
+
+    /** @var Process $process */
+    $process = $method->invoke($manager, ['composer', 'install'], [
+        'HOME' => '/custom/home',
+        'COMPOSER_HOME' => '/custom/composer',
+    ]);
+
+    expect($process->getEnv())->toMatchArray([
+        'HOME' => '/custom/home',
+        'COMPOSER_HOME' => '/custom/composer',
+    ]);
+});