Run with package rootfs so that we have a compiler

Author: fredrikekre

.buildkite/runtests.yml

@@ -2,6 +2,15 @@
 steps:
   - label: ":${OS?}: Test ${OS?}-${ARCH?}"
     plugins:
+      # Julia installation outside the sandbox
+      - JuliaCI/julia#v1:
+          version: '1.10'
+      - staticfloat/sandbox#v2:
+          rootfs_url: https://github.com/JuliaCI/rootfs-images/releases/download/v6.00/package_linux.x86_64.tar.gz
+          rootfs_treehash: "4dcde853eb5baaa0a8f087b633eaf955dc94b5dc"
+          uid: 1000
+          gid: 1000
+      # Julia installation inside the sandbox
       - JuliaCI/julia#v1:
           version: "nightly"
     command: |