diff --git a/.gitea/workflows/builder.yaml b/.gitea/workflows/builder.yaml
index 2057392..69d998a 100644
--- a/.gitea/workflows/builder.yaml
+++ b/.gitea/workflows/builder.yaml
@@ -23,10 +23,9 @@ jobs:
           ./build/amd64.sh
       - name: Upload ISO image to generic package registry
         run: |
-          curl --user your_username:your_password_or_token \
-               --header 'authorization: Bearer ${{ secrets.GITEA_TOKEN }}' \
-               --upload-file halis-debian-11.6.0-amd64.img.xz \
-               https://git.halis.io/api/packages/athens-school/generic/halis-iso-arm64/0.0.1/halis-debian-11.6.0-amd64.img.xz
+          curl --header 'Authorization: token ${{ secrets.REGISTRY_TOKEN }}' \
+               --upload-file halis-12.5.0-amd64.iso \
+               https://git.halis.io/api/packages/athens-school/generic/halis-iso/0.0.1/halis-amd64.iso
 
   build-arm64:
     container:
@@ -43,7 +42,8 @@ jobs:
           apt update
           apt install -y curl xz-utils file sudo
           ./build/arm64.sh
-      - name: Upload ISO image
-        uses: actions/upload-artifact@v4
-        with:
-          path: ./*.img.xz
+      - name: Upload ISO image to generic package registry
+        run: |
+          curl --header 'Authorization: token ${{ secrets.REGISTRY_TOKEN }}' \
+               --upload-file halis-11.6.0-arm64.img.xz \
+               https://git.halis.io/api/packages/athens-school/generic/halis-iso/0.0.1/halis-arm64.img.xz
diff --git a/build/amd64.sh b/build/amd64.sh
index 1fece0f..86c3d69 100755
--- a/build/amd64.sh
+++ b/build/amd64.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-curl -LO http://ftp.acc.umu.se/debian-cd/12.5.0/amd64/iso-cd/debian-12.5.0-amd64-netinst.iso
+curl -LO https://gemmei.ftp.acc.umu.se/mirror/cdimage/archive/12.5.0/amd64/iso-cd/debian-12.5.0-amd64-netinst.iso
 xorriso -osirrox on -indev debian-12.5.0-amd64-netinst.iso -extract / ./isofiles
 chmod +w -R isofiles/
 gunzip ./isofiles/install.amd/initrd.gz
@@ -13,4 +13,4 @@ cd isofiles
 sh -c "find -follow -type f ! -name md5sum.txt -print0 | xargs -0 md5sum > md5sum.txt"
 cd ..
 chmod -w -R isofiles/
-genisoimage -r -J -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o halis-debian-12.5.0-amd64.iso isofiles
+genisoimage -r -J -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o halis-12.5.0-amd64.iso isofiles
diff --git a/build/arm64.sh b/build/arm64.sh
index 786c715..b4bb426 100755
--- a/build/arm64.sh
+++ b/build/arm64.sh
@@ -24,7 +24,7 @@ sudo chroot mnt /bin/sh <<"EOT"
 
 /usr/sbin/usermod -l creator pi
 /usr/sbin/usermod -d /home/creator -m creator
-sed -i 's/creator:\*:/creator:\$6\$saltsalt\$EamwjkVXAe1WqiTTXuzgsmljl5cpVewMLH3xl8TdvQ\/V4S9e30upeNz2bdLkG5\.H71TCEso5Nl0jpyZRx7xy6\/:/g' /etc/shadow
+sed -i 's/creator:!:/creator:\$6\$saltsalt\$EamwjkVXAe1WqiTTXuzgsmljl5cpVewMLH3xl8TdvQ\/V4S9e30upeNz2bdLkG5\.H71TCEso5Nl0jpyZRx7xy6\/:/g' /etc/shadow
 sudo -u creator mkdir -p -m 700 /home/creator/.ssh
 sudo -u creator sh -c 'echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDYsz4jdyzf9UcJ8eEavVmi+DNYE3ioeJBfTlVMw7Vsb tanguy@Diogenes" > /home/creator/.ssh/authorized_keys'
 chmod 600 /home/creator/.ssh/authorized_keys
@@ -37,7 +37,9 @@ EOT
 echo "Unmounting second partition"
 sudo umount mnt -R
 
-echo "Compressing resulting image"
-xz $RASPIOS_IMG
+CORE_COUNT=$((`nproc`-1))
 
-cp $RASPIOS_IMG.xz halis-debian-11.6.0-amd64.img.xz
+echo "Compressing resulting image"
+xz -T$CORE_COUNT $RASPIOS_IMG
+
+mv $RASPIOS_IMG.xz halis-11.6.0-arm64.img.xz