How do I install IntegratedML in IRIS container

I'm having trouble installing IntegratedML in an IRIS 2025.1 container, which I need for a demo. I tried running the following command:

python3 -m pip install --index-url https://registry.intersystems.com/pypi/simple --no-cache-dir --target /usr/irissys/mgr/python intersystems-iris-automl

Unfortunately I get the following error:

Looking in indexes: https://registry.intersystems.com/pypi/simple
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7fe0d095d820>, 'Connection to registry.intersystems.com timed out. (connect timeout=15)')': /pypi/simple/intersystems-iris-automl/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7fe0d084e900>, 'Connection to registry.intersystems.com timed out. (connect timeout=15)')': /pypi/simple/intersystems-iris-automl/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7fe0d084eb10>, 'Connection to registry.intersystems.com timed out. (connect timeout=15)')': /pypi/simple/intersystems-iris-automl/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7fe0d084ed20>, 'Connection to registry.intersystems.com timed out. (connect timeout=15)')': /pypi/simple/intersystems-iris-automl/

I also tried pinging the registry, and it seems the container is unable to reach it:

ping -c 3 registry.intersystems.com
PING ha2-ne-icr.iscinternal.com (172.17.254.152) 56(84) bytes of data.

--- ha2-ne-icr.iscinternal.com ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2117ms

Am I doing something wrong? Is it possible to install IntegratedML in the container, and if so, how should I go about it?