ARM 64 build. U_BOOT. make prefix (wget 404)


I am trying to build ARM64 using this instruction

At build step U_BOOT is called make prefix (aarch64-rebase/ This triggers an attempt to download (aarch64-rebase/mk/

But server does not contain binaries for aarch64-unknown-redox (x86_64-unknown-redox only).
An error occurs:

wget -O prefix/aarch64-unknown-redox/rust-install.tar.gz.partial ""
Connecting to (||:443... connected.
HTTP request sent, awaiting response... 404 Not Found
2021-08-20 12:39:14 ERROR 404: Not Found.

make: *** [mk/ prefix/aarch64-unknown-redox/rust-install.tar.gz] Error 8

Where can you get the required rust-install.tar.gz?


$ git diff
diff --git a/mk/ b/mk/
index 61f4996..77b5745 100644
--- a/mk/
+++ b/mk/
@@ -6,7 +6,7 @@ ARCH?=aarch64
 ## Flags to pass to the installer (empty to download binary packages)
 ## Enabled to use binary prefix (much faster)
 ## Filesystem size in MB (256 is the default)