Update 2 files

Dockerfile.dropshell-build

@@ -38,8 +38,10 @@ RUN --mount=type=cache,target=/ccache \
     ${CMAKE_TOOLCHAIN_FILE:+-DCMAKE_TOOLCHAIN_FILE=$CMAKE_TOOLCHAIN_FILE}
 
 # Build project (ccache will help here when only some files change)
+# Remove stale autogen files to force dehydrate to regenerate from current agent sources
 RUN --mount=type=cache,target=/ccache \
     --mount=type=cache,target=/build \
+    rm -f /app/src/autogen/_agent-remote.* /app/src/autogen/_agent-local.* && \
     cmake --build /build
 
 # Copy the built executables to a regular directory for the final stage