Debian Userland on top of existing Linux build?

[dieselnutjob]

I am looking at this https://wiki.debian.org/Arm64Port

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downloading arm64 debootstrap onto a debian box, unpacking and sending the files over to the quartz64 and running it there seems to be working.
Lets see if it completes....

Code:

root@quartz64:# debootstrap --arch=arm64 testing /root/debian-bookworm http://deb.debian.org/debian/
W: Cannot check Release signature; keyring file not available /usr/share/keyrings/debian-archive-keyring.gpg
I: Retrieving InRelease
I: Retrieving Packages
I: Validating Packages
I: Resolving dependencies of required packages...
I: Resolving dependencies of base packages...
I: Checking component main on http://deb.debian.org/debian...
I: Retrieving libacl1 2.3.1-1
I: Validating libacl1 2.3.1-1
I: Retrieving adduser 3.118
I: Validating adduser 3.118
I: Retrieving libapparmor1 3.0.3-6
I: Validating libapparmor1 3.0.3-6
I: Retrieving apt 2.3.14
I: Validating apt 2.3.14
I: Retrieving apt-utils 2.3.14
W: Couldn't download package apt-utils (ver 2.3.14 arch arm64) at http://deb.debian.org/debian/pool/main/a/apt/apt-utils_2.3.14_arm64.deb
I: Retrieving libapt-pkg6.0 2.3.14
I: Validating libapt-pkg6.0 2.3.14
I: Retrieving libargon2-1 0~20171227-0.2
W: Couldn't download package libargon2-1 (ver 0~20171227-0.2 arch arm64) at http://deb.debian.org/debian/pool/main/a/argon2/libargon2-1_0~20171227-0.2_arm64.deb
I: Retrieving libattr1 1:2.5.1-1
I: Validating libattr1 1:2.5.1-1
I: Retrieving libaudit-common 1:3.0.6-1

I can't get it to work.
After all the downloads it fails to actually extract anything:-

Code:

I: Validating util-linux 2.36.1-8
I: Validating libxxhash0 0.8.0-2
I: Validating liblzma5 5.2.5-2
I: Validating xz-utils 5.2.5-2
I: Validating zlib1g 1:1.2.11.dfsg-2
I: Chosen extractor for .deb packages: ar
I: Extracting libacl1...

does the partition have to be empty or something?