diff --git a/Dockerfile b/Dockerfile
index d3a8564c..0c2c20c1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,15 @@ RUN apt-get update \
  && apt-get install -y --no-install-recommends libfontconfig1 \
  && rm -rf /var/lib/apt/lists/*
 COPY Game /workspace/Game
-RUN godot --headless --editor --path Game --import --quit
+# `.import` metadata is tracked but the generated `.godot/imported` cache is
+# intentionally not. A fresh checkout gives both source and metadata the
+# same timestamp, which can make Godot skip regeneration. Mark importable
+# sources newer so this image always contains a complete generated cache.
+RUN find Game -type f \( -name '*.blend' -o -name '*.glb' -o -name '*.png' -o -name '*.svg' \) -exec touch {} + \
+ && godot --headless --editor --path Game --import --quit \
+ && test -f Game/.godot/imported/nebula_station.glb-fa9a6dd87ae3789d04205b52215e2e76.scn \
+ && test -f Game/.godot/imported/nebula_debris.glb-39af77a17c0998b5b73172577d906cb9.scn \
+ && test -f Game/.godot/imported/nebula_planet.glb-2431590907ff85cf1057e7d6ad614ed7.scn
 
 # Test the source client from an untouched, fully imported project. The
 # dedicated-server export below rewrites the main scene and must not be used