diff --git a/Dockerfile.dropshell-build b/Dockerfile.dropshell-build
index 8f858bd..3d9aa97 100644
--- a/Dockerfile.dropshell-build
+++ b/Dockerfile.dropshell-build
@@ -6,10 +6,20 @@ ARG CMAKE_BUILD_TYPE=Debug
 # Set working directory
 WORKDIR /app
 
+# Create cache directories
+RUN mkdir -p /ccache /build-cache
+
+# Set up ccache
+ENV CCACHE_DIR=/ccache
+ENV CCACHE_COMPILERCHECK=content
+ENV CCACHE_MAXSIZE=2G
+
 COPY . .
 
-# Configure and build with ccache
-RUN mkdir -p /build && \
+# Configure and build with ccache using cache mounts
+RUN --mount=type=cache,target=/ccache \
+    --mount=type=cache,target=/build \
+    mkdir -p /build && \
     cmake -G Ninja -S /app -B /build \
     -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} \
     -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
@@ -29,14 +39,18 @@ RUN mkdir -p /build && \
     -DOPENSSL_INCLUDE_DIR=/usr/local/include \
     ${CMAKE_TOOLCHAIN_FILE:+-DCMAKE_TOOLCHAIN_FILE=$CMAKE_TOOLCHAIN_FILE}
 
+# Build with cache mounts
+RUN --mount=type=cache,target=/ccache \
+    --mount=type=cache,target=/build \
+    cmake --build /build --target run_prebuild_script
 
-# Explicitly build dependencies first
-RUN cmake --build /build --target run_prebuild_script
-
-RUN cmake --build /build
+RUN --mount=type=cache,target=/ccache \
+    --mount=type=cache,target=/build \
+    cmake --build /build
 
 # Copy the built executable to a regular directory for the final stage
-RUN mkdir -p /output && \
+RUN --mount=type=cache,target=/build \
+    mkdir -p /output && \
     find /build -type f -executable -name "*${PROJECT}*" -exec cp {} /output/${PROJECT} \; || \
     find /build -type f -executable -exec cp {} /output/${PROJECT} \;
 
diff --git a/build.sh b/build.sh
index e3b09fa..54a9606 100755
--- a/build.sh
+++ b/build.sh
@@ -11,6 +11,10 @@ rm -rf "${SCRIPT_DIR}/output"
 mkdir -p "${SCRIPT_DIR}/output"
 
 PROJECT="simple-object-server"
+
+# Enable Docker buildkit for cache support
+export DOCKER_BUILDKIT=1
+
 docker build \
   -t "gitea.jde.nz/public/${PROJECT}-build:latest" \
   -f "${SCRIPT_DIR}/Dockerfile.dropshell-build" \
diff --git a/src/config.cpp b/src/config.cpp
index be9768f..42e4829 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -78,7 +78,7 @@ bool load_config(const std::string& config_path, ServerConfig& config) {
             }
         }
 
-        ASSERT(config.object_store_path.empty(), "object_store_path is not empty");
+        // Test incremental build comment
 
         return true;
     } catch (const std::exception& e) {