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README.md

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+# Spark rootfs
+
+If you're here for the tarball, it's [here](https://spark.fleshless.org/rootfs/latest.tar.zst)
+
+If you wanna build this, you'll have to make a fullbase arch image first:
+
+```
+# As root!
+mkdir arch
+pacstrap arch base
+tar -C arch -c . > /tmp/arch.tar
+
+# As your podman/docker rootless user, if you have one
+podman import - archlinux:fullbase < /tmp/arch.tar
+```
+
+Now you can run `build` to make the image, then `DESTDIR=. build-rootfs` to dump it into a tarball.