diff --git a/.castor/docker.php b/.castor/docker.php
index 7505789..494c2df 100644
--- a/.castor/docker.php
+++ b/.castor/docker.php
@@ -287,7 +287,6 @@ function create_default_context(): Context
         'power_shell' => false,
         'user_id' => posix_geteuid(),
         'root_dir' => \dirname(__DIR__),
-        'env' => $_SERVER['CI'] ?? false ? 'ci' : 'dev',
     ];
 
     if (file_exists($data['root_dir'] . '/infrastructure/docker/docker-compose.override.yml')) {
@@ -331,9 +330,32 @@ function create_default_context(): Context
         $data['user_id'] = 1000;
     }
 
-    return new Context($data, pty: 'dev' === $data['env']);
+    return new Context(
+        $data,
+        pty: Process::isPtySupported(),
+        environment: [
+            'BUILDKIT_PROGRESS' => 'plain',
+        ]
+    );
+}
+
+#[AsContext(name: 'ci')]
+function create_ci_context(): Context
+{
+    $c = create_default_context();
+
+    return $c
+        ->withData([
+            // override the default context here
+        ])
+        ->withEnvironment([
+            'BUILDKIT_PROGRESS' => 'plain',
+            'COMPOSE_ANSI' => 'never',
+        ])
+    ;
 }
 
+
 /**
  * @param array<string> $subCommand
  */
@@ -353,8 +375,7 @@ function docker_compose(array $subCommand, ?Context $c = null, bool $withBuilder
             'USER_ID' => variable('user_id'),
             'COMPOSER_CACHE_DIR' => variable('composer_cache_dir'),
             'PHP_VERSION' => variable('php_version'),
-            'BUILDKIT_PROGRESS' => 'plain',
-        ])
+        ], true)
     ;
 
     $command = [
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b3bb9b0..f833030 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,6 +11,9 @@ name: Continuous Integration
 permissions:
     contents: read
 
+env:
+    COMPOSE_ANSI: never
+
 jobs:
     check-dockerfiles:
         name: Check Dockerfile
@@ -33,8 +36,6 @@ jobs:
         runs-on: ubuntu-latest
         env:
             DS_PHP_VERSION: ${{ matrix.php-version }}
-            BUILDKIT_PROGRESS: plain
-            CI: 1
         steps:
             - uses: actions/checkout@v4