diff --git a/preview.yml b/preview.yml
index e7ee2f7a05e8139eaf3271fbcae3985828362e17..a374d7c3ade566ca51be1710ef1333a055644fe6 100644
--- a/preview.yml
+++ b/preview.yml
@@ -1,7 +1,7 @@
 autoOpen: true
 apps:
   - port: 8523
-    command: /usr/bin/env /usr/lib/jvm/java-17-openjdk-amd64/bin/java -XX:+ShowCodeDetailsInExceptionMessages -cp /ide/workspace/1024opensource/bin fpzork.FunctionalZork
+    command: javac src/fpzork/*.java -d bin && /usr/bin/env /usr/lib/jvm/java-17-openjdk-amd64/bin/java -XX:+ShowCodeDetailsInExceptionMessages -cp /ide/workspace/1024opensource/bin fpzork.FunctionalZork
     root: ./
     name: FunctionalZork
     description: FunctionalZork