diff --git a/.gitignore b/.gitignore
index 32c700eef..8e62e3070 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,3 +23,4 @@ tmp
 web/.i18n-checked
 docs/USER.md
 *.s9pk
+/build/lib/migration-images
diff --git a/Makefile b/Makefile
index 6ad4b1291..e876bc5fb 100644
--- a/Makefile
+++ b/Makefile
@@ -15,7 +15,7 @@ IMAGE_TYPE=$(shell if [ "$(PLATFORM)" = raspberrypi ]; then echo img; else echo
 WEB_UIS := web/dist/raw/ui/index.html web/dist/raw/setup-wizard/index.html
 COMPRESSED_WEB_UIS := web/dist/static/ui/index.html web/dist/static/setup-wizard/index.html
 FIRMWARE_ROMS := build/lib/firmware/$(PLATFORM) $(shell jq --raw-output '.[] | select(.platform[] | contains("$(PLATFORM)")) | "./build/lib/firmware/$(PLATFORM)/" + .id + ".rom.gz"' build/lib/firmware.json)
-BUILD_SRC := $(call ls-files, build/lib) build/lib/depends build/lib/conflicts $(FIRMWARE_ROMS)
+BUILD_SRC := $(call ls-files, build/lib) build/lib/depends build/lib/conflicts $(FIRMWARE_ROMS) build/lib/migration-images/.done
 IMAGE_RECIPE_SRC := $(call ls-files, build/image-recipe/)
 STARTD_SRC := core/startd.service $(BUILD_SRC)
 CORE_SRC := $(call ls-files, core) $(shell git ls-files --recurse-submodules patch-db) $(GIT_HASH_FILE)
@@ -89,6 +89,7 @@ clean:
 	rm -rf container-runtime/node_modules
 	rm -f container-runtime/*.squashfs
 	(cd sdk && make clean)
+	rm -rf build/lib/migration-images
 	rm -f env/*.txt
 
 format:
@@ -105,6 +106,10 @@ test-sdk: $(call ls-files, sdk) sdk/base/lib/osBindings/index.ts
 test-container-runtime: container-runtime/node_modules/.package-lock.json $(call ls-files, container-runtime/src) container-runtime/package.json container-runtime/tsconfig.json 
 	cd container-runtime && npm test
 
+build/lib/migration-images/.done: build/save-migration-images.sh
+	ARCH=$(ARCH) ./build/save-migration-images.sh build/lib/migration-images
+	touch $@
+
 install-cli: $(GIT_HASH_FILE)
 	./core/build/build-cli.sh --install
 
diff --git a/build/save-migration-images.sh b/build/save-migration-images.sh
new file mode 100755
index 000000000..d3bbff401
--- /dev/null
+++ b/build/save-migration-images.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+# Save Docker images needed by the 0.3.6-alpha.0 migration as tarballs
+# so they can be bundled into the OS and loaded without internet access.
+set -e
+
+ARCH="${ARCH:-x86_64}"
+DESTDIR="${1:-build/lib/migration-images}"
+
+if [ "$ARCH" = "x86_64" ]; then
+    DOCKER_PLATFORM="linux/amd64"
+elif [ "$ARCH" = "aarch64" ]; then
+    DOCKER_PLATFORM="linux/arm64"
+else
+    DOCKER_PLATFORM="linux/$ARCH"
+fi
+
+IMAGES=("start9/compat:latest" "start9/utils:latest" "tonistiigi/binfmt:latest")
+
+mkdir -p "$DESTDIR"
+
+for IMAGE in "${IMAGES[@]}"; do
+    FILENAME=$(echo "$IMAGE" | sed 's|/|_|g; s/:/_/g').tar
+    if [ -f "$DESTDIR/$FILENAME" ]; then
+        echo "Skipping $IMAGE (already saved)"
+        continue
+    fi
+    echo "Pulling $IMAGE for $DOCKER_PLATFORM..."
+    docker pull --platform "$DOCKER_PLATFORM" "$IMAGE"
+    echo "Saving $IMAGE to $DESTDIR/$FILENAME..."
+    docker save "$IMAGE" -o "$DESTDIR/$FILENAME"
+done
+
+echo "Migration images saved to $DESTDIR"