diff --git a/Dockerfile b/Dockerfile
index d2fde4e..e783e8a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,10 +16,10 @@ WORKDIR /app
 RUN git clone --depth=1 https://git.moreminimore.com/kunthawat/emdash-patch-imageupload.git emdash-source
 WORKDIR /app/emdash-source
 
-# Build only the emdash package (it's named "emdash" not "@emdash-cms/core")
+# Build only the core package directly (not via workspace filter)
 RUN corepack enable && corepack prepare pnpm@9.0.0 --activate
 RUN pnpm install
-RUN pnpm build --filter emdash
+RUN cd packages/core && pnpm build
 
 # Return to app and copy source
 WORKDIR /app