diff --git a/infra/colony/Dockerfile b/infra/colony/Dockerfile
index 87f24da..b24e565 100644
--- a/infra/colony/Dockerfile
+++ b/infra/colony/Dockerfile
@@ -16,16 +16,16 @@ COPY Cargo.toml Cargo.lock ./
 COPY crates/colony-types/Cargo.toml crates/colony-types/Cargo.toml
 COPY crates/colony/Cargo.toml crates/colony/Cargo.toml
 COPY crates/colony/migrations crates/colony/migrations
+# Build deps only (stub sources, then delete artifacts so real build triggers)
 RUN mkdir -p crates/colony-types/src crates/colony/src \
     && echo "fn main() {}" > crates/colony/src/main.rs \
-    && echo "" > crates/colony-types/src/lib.rs \
-    && cargo build --release -p colony 2>/dev/null || true \
-    && rm -rf target/release/colony target/release/deps/colony-* \
-    && rm crates/colony/src/main.rs crates/colony-types/src/lib.rs
+    && echo "pub fn _stub() {}" > crates/colony-types/src/lib.rs \
+    && cargo build --release -p colony 2>/dev/null || true
 
-# Now copy real source and build (deps already cached, binary removed so cargo rebuilds)
+# Copy real source — touch both crates to force recompile
 COPY crates/ crates/
-RUN cargo build --release -p colony
+RUN touch crates/colony-types/src/lib.rs crates/colony/src/main.rs \
+    && cargo build --release -p colony
 
 # Stage 3: Runtime
 FROM debian:bookworm-slim