diff --git a/Dockerfile b/Dockerfile
index e0d4626..2198f2b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,12 +9,13 @@ RUN apt-get update && apt-get install -y \
     libssl-dev \
     && rm -rf /var/lib/apt/lists/*
 
-# Copy manifests
+# Copy manifests and source
 COPY Cargo.toml Cargo.lock ./
+RUN mkdir -p src && echo '// workspace root' > src/lib.rs
 COPY crates ./crates
 
 # Build release binary
-RUN cargo build --release --bin mem
+RUN cargo build --release -p mem-cli --bin mem
 
 # Runtime stage
 FROM debian:bookworm-slim
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..ee4303f
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1 @@
+// Workspace root - integration tests live in tests/