diff --git a/docker-compose.yml b/docker-compose.yml
index b5a7d61..3721180 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -75,8 +75,13 @@ services:
 
   # The live fine-tuned model behind the Classifier bot. GPU-only — opt in with
   # `--profile gpu`. Uses the psyc-trainer image (built from Dockerfile.train).
+  # The build context is local so `docker compose --profile gpu build inference`
+  # actually builds it (without this, compose silently skips the build).
   inference:
     image: psyc-trainer
+    build:
+      context: .
+      dockerfile: Dockerfile.train
     command: ["/scripts/serve_model.py", "--adapter", "/data/adapters/psyc-v5/final", "--host", "0.0.0.0", "--port", "8771"]
     volumes:
       - ./data:/data