diff --git a/README.md b/README.md
index dbce297..56bb5a0 100644
--- a/README.md
+++ b/README.md
@@ -12,20 +12,19 @@ The following settings are available for configuration by setting the respective
 Verify that the configured settings are suitable for the cluster you want to create the template for.  
 If left unset, the respective default value will be used.
 
-| Variable  | Default                                 | Description                                                            |
-| --------- | --------------------------------------- | ---------------------------------------------------------------------- |
-| `VMID`    | 9023                                    | ID the template should have in Proxmox                                 |
-| `STORAGE` | `local-zfs`                             | Pool the disks should be created in                                    |
-| `OS`      | `debian-12`                             | `virt-builder` name of the OS to install                               |
-| `NAME`    | `chaos-${OS}-tmpl-$(date -u +%Y-%m-%d)` | name of the template                                                   |
-| `BRIDGE`  | `vmbr0,tag=208`                         | name of the bridge to use and any parameters needed, like the VLAN tag |
+| Variable              | Default                                                                                               | Description                                                            |
+| --------------------- | ----------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------- |
+| `VMID`                | 9023                                                                                                  | ID the template should have in Proxmox                                 |
+| `STORAGE`             | `local-zfs`                                                                                           | Pool the disks should be created in                                    |
+| `OS`                  | `debian-12`                                                                                           | `virt-builder` name of the OS to install                               |
+| `NAME`                | `chaos-${OS}-tmpl-$(date -u +%Y-%m-%d)`                                                               | name of the template                                                   |
+| `BRIDGE`              | `vmbr0,tag=208`                                                                                       | name of the bridge to use and any parameters needed, like the VLAN tag |
+| `AUTHORIZED_KEYS_URL` | `https://git.hamburg.ccc.de/CCCHH/infrastructure-authorized-keys/raw/branch/trunk/authorized_keys`    | URL to download the authorized_keys file to use from                   |
 
 ### User Account, sshd, and `authorized_keys`
 
 `cloud-init` will create a user `chaos`, by default with a locked password, and authorized keys initialized. Password-less `sudo` is configured, so you can run commands as root.
 
-The script expects `authorized_keys` to be in the current directory. Copy the correct contents from the [appropriate repository](https://gitlab.hamburg.ccc.de/ccchh/infrastructure-authorized-keys).
-
 `sshd` has been configured to listen on port 42666 instead of 22.
 
 ### Run the Script
diff --git a/build-proxmox-template b/build-proxmox-template
index 970fdd5..31d36ea 100755
--- a/build-proxmox-template
+++ b/build-proxmox-template
@@ -10,6 +10,7 @@
 : "${OS:=debian-12}"
 : "${NAME:=chaos-${OS}-tmpl-$(date -u +%Y-%m-%d)}"
 : "${BRIDGE:=vmbr0,tag=208}"
+: "${AUTHORIZED_KEYS_URL:=https://git.hamburg.ccc.de/CCCHH/infrastructure-authorized-keys/raw/branch/trunk/authorized_keys}"
 
 set -eE
 
@@ -27,7 +28,7 @@ cleanup() {
 }
 
 
-wget -4 https://git.hamburg.ccc.de/CCCHH/infrastructure-authorized-keys/raw/branch/trunk/authorized_keys -O authorized_keys
+wget -4 "$AUTHORIZED_KEYS_URL" -O authorized_keys
 wget https://cloud.debian.org/images/cloud/bookworm/latest/debian-12-generic-amd64.tar.xz -O debian-12-generic-amd64.tar.xz
 wget https://cloud.debian.org/images/cloud/bookworm/latest/SHA512SUMS -O SHA512SUMS
 sha512sum --ignore-missing -c SHA512SUMS
@@ -46,7 +47,6 @@ qm destroy ${VMID} || true
 qm create ${VMID} --name "creating-vm" --memory 2048 --net0 virtio,bridge=${BRIDGE}
 qm importdisk ${VMID} disk.raw ${STORAGE}
 rm disk.raw
-popd
 
 qm set ${VMID} --scsihw virtio-scsi-pci --scsi0 ${STORAGE}:vm-${VMID}-disk-0,ssd=1,discard=on
 qm set ${VMID} --ide2 ${STORAGE}:cloudinit
@@ -64,3 +64,4 @@ qm set ${VMID} --ipconfig0 ip=dhcp
 qm set ${VMID} --name ${NAME} --tags debian12
 qm cloudinit update ${VMID}
 qm template ${VMID}
+popd