diff --git a/server/tar2squashfs.js b/server/tar2squashfs.js
index 336cda8..bff7a7f 100644
--- a/server/tar2squashfs.js
+++ b/server/tar2squashfs.js
@@ -48,7 +48,9 @@ export async function tar2squashfs(streams, output, extraFiles) {
   p.pipe(child.stdin);
   p.on("error", console.error);
 
-  for (const streamP of streams) {
+  // We reverse the arrays because mksquashfs ignores files if they already exist,
+  // so we leave the last layers first so they are the ones used instead of the last ones
+  for (const streamP of [...streams].reverse()) {
     const stream = await streamP;
     const ex = extract();