`az extension add -n ml` stuck on Win arm64

[Ilia-Kosenkov]

Describe the bug

Unable to install ml extension on Win arm64 machine. It just hangs indefinitely.

Related command

az extension add -n ml --debug

Errors

Stuck indefinitely

Issue script & Debug output

It is stuck running wheel installation

cli.azure.cli.core.extension.operations: Executing pip with args: ['install', '--target', 'C:\\Users\\...\\.azure\\cliextensions\\ml', 'C:\\Users\\...\\AppData\\Local\\Temp\\tmptz_kpu8b\\ml-2.44.1-py3-none-any.whl']
cli.azure.cli.core.extension.operations: Running: ['C:\\Program Files\\Microsoft SDKs\\Azure\\CLI2\\python.exe', '-m', 'pip', 'install', '--target', 'C:\\Users\\...\\.azure\\cliextensions\\ml', 'C:\\Users\\...\\AppData\\Local\\Temp\\tmptz_kpu8b\\ml-2.44.1-py3-none-any.whl', '--disable-pip-version-check', '--no-cache-dir']

Expected behavior

The extension is installed.

Environment Summary

azure-cli                         2.79.0 *

core                              2.79.0 *
telemetry                          1.1.0

Extensions:
amg                                2.8.1
resource-graph                     2.1.1

Dependencies:
msal                            1.34.0b1
azure-mgmt-resource               23.3.0

Python location 'C:\Program Files\Microsoft SDKs\Azure\CLI2\python.exe'
Config directory 'C:\Users\...\.azure'
Extensions directory 'C:\Users\...\.azure\cliextensions'

Python (Windows) 3.13.9 (tags/v3.13.9:8183fa5, Oct 14 2025, 14:09:13) [MSC v.1944 64 bit (AMD64)]

Additional context

I checked similar issues but I failed to find anything related to instalation not progressing past a certain point

[azure-client-tools-bot-prd]

Hi @Ilia-Kosenkov,

2.79.0 is not the latest Azure CLI(2.88.0).

If you haven't already attempted to do so, please upgrade to the latest Azure CLI version by following https://learn.microsoft.com/en-us/cli/azure/update-azure-cli.

[yonzhan]

Thank you for opening this issue, we will look into it.

[azure-client-tools-agent]

Hi @Ilia-Kosenkov, thanks for the report. Before this can be investigated further, could you help fill in a few gaps?

• Confirm on the latest CLI: you're on 2.79.0, but the current release is 2.88.0. Please upgrade (https://learn.microsoft.com/en-us/cli/azure/update-azure-cli) and confirm whether az extension add -n ml still hangs on Win arm64.
• Full --debug output: the snippet shows the pip install command being launched, but not where it actually stalls (dependency resolution, download, wheel build, etc.). Please share the complete --debug log up to the point it hangs, or the last several minutes of output before you gave up waiting.
• Does it ever complete or time out? e.g. after 10/30/60 minutes, or truly indefinite (hours)?
• Network/proxy context: any corporate proxy, firewall, or restricted PyPI mirror in play on this arm64 machine that might affect pip's dependency resolution for the ml extension's wheel/dependencies?
• Native vs emulated Python: is C:\\Program Files\\Microsoft SDKs\\Azure\\CLI2\\python.exe a native arm64 build, or running under x64 emulation?

I'll pick this up automatically once you reply with these details.

---

Posted by agent-assist (autonomous bug-fix pipeline).

[Ilia-Kosenkov]

1. Updated to

azure-cli                         2.88.0

core                              2.88.0
telemetry                          1.1.0

Extensions:
amg                                2.8.1
resource-graph                     2.1.1

Dependencies:
msal                              1.36.0
azure-mgmt-resource               24.0.0

Python location 'C:\Program Files\Microsoft SDKs\Azure\CLI2\python.exe'
Config directory 'C:\Users\REDACTED\.azure'
Extensions directory 'C:\Users\REDACTED\.azure\cliextensions'

Python (Windows) 3.14.5 (tags/v3.14.5:5607950, May 10 2026, 10:43:50) [MSC v.1944 64 bit (AMD64)]

2. It stalls on pip install, on the python launch. I see no other outputs, it just sits there indefinitely.

Logs

cli.knack.cli: Command arguments: ['extension', 'add', '-n', 'ml', '--debug']
cli.knack.cli: __init__ debug log:
Enable color in terminal.
cli.knack.cli: Event: Cli.PreExecute []
cli.knack.cli: Event: CommandParser.OnGlobalArgumentsCreate [<function CLILogging.on_global_arguments at 0x000001BCBBEC5A60>, <function OutputProducer.on_global_arguments at 0x000001BCBC3D09E0>, <function CLIQuery.on_global_arguments at 0x000001BCBC3FB060>]
cli.knack.cli: Event: CommandInvoker.OnPreCommandTableCreate []
cli.azure.cli.core: Using packaged command index for profile 'latest'.
cli.azure.cli.core: Found installed extension 'amg' (azext_amg).
cli.azure.cli.core: Modules found from index for 'extension': ['azure.cli.command_modules.extension']
cli.azure.cli.core: Extension index is unavailable. Loading all installed extensions for safety.
cli.azure.cli.core: Loading command modules...
cli.azure.cli.core: Name                  Load Time    Groups  Commands
cli.azure.cli.core: extension                 0.004         1         7
cli.azure.cli.core: Loaded command modules:
cli.azure.cli.core: Total (1)                 0.004         1         7
cli.azure.cli.core: Loading extensions:
cli.azure.cli.core: Name                  Load Time    Groups  Commands  Directory
cli.azure.cli.core: amg                       0.550        11        47  C:\Users\REDACTED\.azure\cliextensions\amg
cli.azure.cli.core: resource-graph            0.051         2         5  C:\Users\REDACTED\.azure\cliextensions\resource-graph
cli.azure.cli.core: Total (2)                 0.601        13        52
cli.azure.cli.core: Cached top-level help with 3 groups and 0 commands
cli.azure.cli.core: Loaded 14 groups, 59 commands.
cli.azure.cli.core: Found a match in the command table.
cli.azure.cli.core: Raw command  : extension add
cli.azure.cli.core: Command table: extension add
cli.knack.cli: Event: CommandInvoker.OnPreCommandTableTruncate [<function AzCliLogging.init_command_file_logging at 0x000001BCBC9FF7F0>]
cli.azure.cli.core.azlogging: metadata file logging enabled - writing logs to 'C:\Users\REDACTED\.azure\commands\2026-07-21.13-51-07.extension_add.26608.log'.
az_command_data_logger: command args: extension add -n {} --debug
cli.knack.cli: Event: CommandInvoker.OnPreArgumentLoad [<function register_global_subscription_argument.<locals>.add_subscription_parameter at 0x000001BCBEF31380>]
cli.knack.cli: Event: CommandInvoker.OnPostArgumentLoad []
cli.knack.cli: Event: CommandInvoker.OnPostCommandTableCreate [<function register_ids_argument.<locals>.add_ids_arguments at 0x000001BCBF2D6820>, <function register_global_policy_argument.<locals>.add_global_policy_argument at 0x000001BCBF2D68D0>, <function register_cache_arguments.<locals>.add_cache_arguments at 0x000001BCBF2D6980>, <function register_upcoming_breaking_change_info.<locals>.update_breaking_change_info at 0x000001BCBF2D6A30>]
cli.knack.cli: Event: CommandInvoker.OnCommandTableLoaded []
cli.knack.cli: Event: CommandInvoker.OnPreParseArgs []
cli.knack.cli: Event: CommandInvoker.OnPostParseArgs [<function OutputProducer.handle_output_argument at 0x000001BCBC3D0A90>, <function CLIQuery.handle_query_parameter at 0x000001BCBC3FB110>, <function register_ids_argument.<locals>.parse_ids_arguments at 0x000001BCBF2D6770>]
urllib3.connectionpool: Starting new HTTPS connection (1): aka.ms:443
urllib3.connectionpool: https://aka.ms:443 "GET /azure-cli-extension-index-v1 HTTP/1.1" 301 0
urllib3.connectionpool: Starting new HTTPS connection (1): azcliextensionsync.blob.core.windows.net:443
urllib3.connectionpool: https://azcliextensionsync.blob.core.windows.net:443 "GET /index1/index.json HTTP/1.1" 200 4867235
cli.azure.cli.core.extension._resolve: Candidates ['ml-2.0.0a1-py3-none-any.whl', 'ml-2.0.1a1-py3-none-any.whl', 'ml-2.0.1a2-py3-none-any.whl', 'ml-2.0.1a3-py3-none-any.whl', 'ml-2.0.1a4-py3-none-any.whl', 'ml-2.0.1a5-py3-none-any.whl', 'ml-2.0.2-py3-none-any.whl', 'ml-2.0.3-py3-none-any.whl', 'ml-2.0.7-py3-none-any.whl', 'ml-2.1.1-py3-none-any.whl', 'ml-2.1.2-py3-none-any.whl', 'ml-2.2.1-py3-none-any.whl', 'ml-2.2.2-py3-none-any.whl', 'ml-2.2.3-py3-none-any.whl', 'ml-2.3.1-py3-none-any.whl', 'ml-2.4.0-py3-none-any.whl', 'ml-2.4.1-py3-none-any.whl', 'ml-2.5.0-py3-none-any.whl', 'ml-2.6.0-py3-none-any.whl', 'ml-2.6.1-py3-none-any.whl', 'ml-2.7.0-py3-none-any.whl', 'ml-2.7.1-py3-none-any.whl', 'ml-2.8.0-py3-none-any.whl', 'ml-2.9.0-py3-none-any.whl', 'ml-2.10.0-py3-none-any.whl', 'ml-2.11.0-py3-none-any.whl', 'ml-2.12.0-py3-none-any.whl', 'ml-2.12.1-py3-none-any.whl', 'ml-2.13.0-py3-none-any.whl', 'ml-2.14.0-py3-none-any.whl', 'ml-2.14.1-py3-none-any.whl', 'ml-2.15.0-py3-none-any.whl', 'ml-2.15.1-py3-none-any.whl', 'ml-2.16.0-py3-none-any.whl', 'ml-2.17.0-py3-none-any.whl', 'ml-2.17.1-py3-none-any.whl', 'ml-2.17.2-py3-none-any.whl', 'ml-2.18.0-py3-none-any.whl', 'ml-2.19.0-py3-none-any.whl', 'ml-2.19.1-py3-none-any.whl', 'ml-2.20.0-py3-none-any.whl', 'ml-2.21.0-py3-none-any.whl', 'ml-2.21.1-py3-none-any.whl', 'ml-2.22.0-py3-none-any.whl', 'ml-2.23.0-py3-none-any.whl', 'ml-2.24.0-py3-none-any.whl', 'ml-2.25.0-py3-none-any.whl', 'ml-2.25.1-py3-none-any.whl', 'ml-2.26.0-py3-none-any.whl', 'ml-2.26.1-py3-none-any.whl', 'ml-2.27.0-py3-none-any.whl', 'ml-2.27.1-py3-none-any.whl', 'ml-2.28.0-py3-none-any.whl', 'ml-2.29.0-py3-none-any.whl', 'ml-2.30.0-py3-none-any.whl', 'ml-2.30.1-py3-none-any.whl', 'ml-2.31.0-py3-none-any.whl', 'ml-2.31.1-py3-none-any.whl', 'ml-2.32.0-py3-none-any.whl', 'ml-2.32.1-py3-none-any.whl', 'ml-2.32.4-py3-none-any.whl', 'ml-2.33.0-py3-none-any.whl', 'ml-2.33.1-py3-none-any.whl', 'ml-2.34.0-py3-none-any.whl', 'ml-2.35.0-py3-none-any.whl', 'ml-2.36.0-py3-none-any.whl', 'ml-2.36.1-py3-none-any.whl', 'ml-2.36.2-py3-none-any.whl', 'ml-2.36.3-py3-none-any.whl', 'ml-2.36.4-py3-none-any.whl', 'ml-2.36.5-py3-none-any.whl', 'ml-2.37.0-py3-none-any.whl', 'ml-2.37.1-py3-none-any.whl', 'ml-2.37.2-py3-none-any.whl', 'ml-2.37.3-py3-none-any.whl', 'ml-2.38.0-py3-none-any.whl', 'ml-2.38.1-py3-none-any.whl', 'ml-2.39.0-py3-none-any.whl', 'ml-2.40.0-py3-none-any.whl', 'ml-2.40.1-py3-none-any.whl', 'ml-2.41.0-py3-none-any.whl', 'ml-2.41.1-py3-none-any.whl', 'ml-2.42.0-py3-none-any.whl', 'ml-2.43.0-py3-none-any.whl', 'ml-2.44.0-py3-none-any.whl', 'ml-2.44.1-py3-none-any.whl']
cli.azure.cli.core.extension._resolve: Candidates ['ml-2.0.0a1-py3-none-any.whl', 'ml-2.0.1a1-py3-none-any.whl', 'ml-2.0.1a2-py3-none-any.whl', 'ml-2.0.1a3-py3-none-any.whl', 'ml-2.0.1a4-py3-none-any.whl', 'ml-2.0.1a5-py3-none-any.whl', 'ml-2.0.2-py3-none-any.whl', 'ml-2.0.3-py3-none-any.whl', 'ml-2.0.7-py3-none-any.whl', 'ml-2.1.1-py3-none-any.whl', 'ml-2.1.2-py3-none-any.whl', 'ml-2.2.1-py3-none-any.whl', 'ml-2.2.2-py3-none-any.whl', 'ml-2.2.3-py3-none-any.whl', 'ml-2.3.1-py3-none-any.whl', 'ml-2.4.0-py3-none-any.whl', 'ml-2.4.1-py3-none-any.whl', 'ml-2.5.0-py3-none-any.whl', 'ml-2.6.0-py3-none-any.whl', 'ml-2.6.1-py3-none-any.whl', 'ml-2.7.0-py3-none-any.whl', 'ml-2.7.1-py3-none-any.whl', 'ml-2.8.0-py3-none-any.whl', 'ml-2.9.0-py3-none-any.whl', 'ml-2.10.0-py3-none-any.whl', 'ml-2.11.0-py3-none-any.whl', 'ml-2.12.0-py3-none-any.whl', 'ml-2.12.1-py3-none-any.whl', 'ml-2.13.0-py3-none-any.whl', 'ml-2.14.0-py3-none-any.whl', 'ml-2.14.1-py3-none-any.whl', 'ml-2.15.0-py3-none-any.whl', 'ml-2.15.1-py3-none-any.whl', 'ml-2.16.0-py3-none-any.whl', 'ml-2.17.0-py3-none-any.whl', 'ml-2.17.1-py3-none-any.whl', 'ml-2.17.2-py3-none-any.whl', 'ml-2.18.0-py3-none-any.whl', 'ml-2.19.0-py3-none-any.whl', 'ml-2.19.1-py3-none-any.whl', 'ml-2.20.0-py3-none-any.whl', 'ml-2.21.0-py3-none-any.whl', 'ml-2.21.1-py3-none-any.whl', 'ml-2.22.0-py3-none-any.whl', 'ml-2.23.0-py3-none-any.whl', 'ml-2.24.0-py3-none-any.whl', 'ml-2.25.0-py3-none-any.whl', 'ml-2.25.1-py3-none-any.whl', 'ml-2.26.0-py3-none-any.whl', 'ml-2.26.1-py3-none-any.whl', 'ml-2.27.0-py3-none-any.whl', 'ml-2.27.1-py3-none-any.whl', 'ml-2.28.0-py3-none-any.whl', 'ml-2.29.0-py3-none-any.whl', 'ml-2.30.0-py3-none-any.whl', 'ml-2.30.1-py3-none-any.whl', 'ml-2.31.0-py3-none-any.whl', 'ml-2.31.1-py3-none-any.whl', 'ml-2.32.0-py3-none-any.whl', 'ml-2.32.1-py3-none-any.whl', 'ml-2.32.4-py3-none-any.whl', 'ml-2.33.0-py3-none-any.whl', 'ml-2.33.1-py3-none-any.whl', 'ml-2.34.0-py3-none-any.whl', 'ml-2.35.0-py3-none-any.whl', 'ml-2.36.0-py3-none-any.whl', 'ml-2.36.1-py3-none-any.whl', 'ml-2.36.2-py3-none-any.whl', 'ml-2.36.3-py3-none-any.whl', 'ml-2.36.4-py3-none-any.whl', 'ml-2.36.5-py3-none-any.whl', 'ml-2.37.0-py3-none-any.whl', 'ml-2.37.1-py3-none-any.whl', 'ml-2.37.2-py3-none-any.whl', 'ml-2.37.3-py3-none-any.whl', 'ml-2.38.0-py3-none-any.whl', 'ml-2.38.1-py3-none-any.whl', 'ml-2.39.0-py3-none-any.whl', 'ml-2.40.0-py3-none-any.whl', 'ml-2.40.1-py3-none-any.whl', 'ml-2.41.0-py3-none-any.whl', 'ml-2.41.1-py3-none-any.whl', 'ml-2.42.0-py3-none-any.whl', 'ml-2.43.0-py3-none-any.whl', 'ml-2.44.0-py3-none-any.whl', 'ml-2.44.1-py3-none-any.whl']
cli.azure.cli.core.extension._resolve: Candidates ['ml-2.4.0-py3-none-any.whl', 'ml-2.4.1-py3-none-any.whl', 'ml-2.5.0-py3-none-any.whl', 'ml-2.6.0-py3-none-any.whl', 'ml-2.6.1-py3-none-any.whl', 'ml-2.7.0-py3-none-any.whl', 'ml-2.7.1-py3-none-any.whl', 'ml-2.8.0-py3-none-any.whl', 'ml-2.9.0-py3-none-any.whl', 'ml-2.10.0-py3-none-any.whl', 'ml-2.11.0-py3-none-any.whl', 'ml-2.12.0-py3-none-any.whl', 'ml-2.12.1-py3-none-any.whl', 'ml-2.13.0-py3-none-any.whl', 'ml-2.14.0-py3-none-any.whl', 'ml-2.14.1-py3-none-any.whl', 'ml-2.15.0-py3-none-any.whl', 'ml-2.15.1-py3-none-any.whl', 'ml-2.16.0-py3-none-any.whl', 'ml-2.17.0-py3-none-any.whl', 'ml-2.17.1-py3-none-any.whl', 'ml-2.17.2-py3-none-any.whl', 'ml-2.18.0-py3-none-any.whl', 'ml-2.19.0-py3-none-any.whl', 'ml-2.19.1-py3-none-any.whl', 'ml-2.20.0-py3-none-any.whl', 'ml-2.21.0-py3-none-any.whl', 'ml-2.21.1-py3-none-any.whl', 'ml-2.22.0-py3-none-any.whl', 'ml-2.23.0-py3-none-any.whl', 'ml-2.24.0-py3-none-any.whl', 'ml-2.25.0-py3-none-any.whl', 'ml-2.25.1-py3-none-any.whl', 'ml-2.26.0-py3-none-any.whl', 'ml-2.26.1-py3-none-any.whl', 'ml-2.27.0-py3-none-any.whl', 'ml-2.27.1-py3-none-any.whl', 'ml-2.28.0-py3-none-any.whl', 'ml-2.29.0-py3-none-any.whl', 'ml-2.30.0-py3-none-any.whl', 'ml-2.30.1-py3-none-any.whl', 'ml-2.31.0-py3-none-any.whl', 'ml-2.31.1-py3-none-any.whl', 'ml-2.32.0-py3-none-any.whl', 'ml-2.32.1-py3-none-any.whl', 'ml-2.32.4-py3-none-any.whl', 'ml-2.33.0-py3-none-any.whl', 'ml-2.33.1-py3-none-any.whl', 'ml-2.34.0-py3-none-any.whl', 'ml-2.35.0-py3-none-any.whl', 'ml-2.36.0-py3-none-any.whl', 'ml-2.36.1-py3-none-any.whl', 'ml-2.36.2-py3-none-any.whl', 'ml-2.36.3-py3-none-any.whl', 'ml-2.36.4-py3-none-any.whl', 'ml-2.36.5-py3-none-any.whl', 'ml-2.37.0-py3-none-any.whl', 'ml-2.37.1-py3-none-any.whl', 'ml-2.37.2-py3-none-any.whl', 'ml-2.37.3-py3-none-any.whl', 'ml-2.38.0-py3-none-any.whl', 'ml-2.38.1-py3-none-any.whl', 'ml-2.39.0-py3-none-any.whl', 'ml-2.40.0-py3-none-any.whl', 'ml-2.40.1-py3-none-any.whl', 'ml-2.41.0-py3-none-any.whl', 'ml-2.41.1-py3-none-any.whl', 'ml-2.42.0-py3-none-any.whl', 'ml-2.43.0-py3-none-any.whl', 'ml-2.44.0-py3-none-any.whl', 'ml-2.44.1-py3-none-any.whl']
cli.azure.cli.core.extension._resolve: Candidates ['ml-2.4.0-py3-none-any.whl', 'ml-2.4.1-py3-none-any.whl', 'ml-2.5.0-py3-none-any.whl', 'ml-2.6.0-py3-none-any.whl', 'ml-2.6.1-py3-none-any.whl', 'ml-2.7.0-py3-none-any.whl', 'ml-2.7.1-py3-none-any.whl', 'ml-2.8.0-py3-none-any.whl', 'ml-2.9.0-py3-none-any.whl', 'ml-2.10.0-py3-none-any.whl', 'ml-2.11.0-py3-none-any.whl', 'ml-2.12.0-py3-none-any.whl', 'ml-2.12.1-py3-none-any.whl', 'ml-2.13.0-py3-none-any.whl', 'ml-2.14.0-py3-none-any.whl', 'ml-2.14.1-py3-none-any.whl', 'ml-2.15.0-py3-none-any.whl', 'ml-2.15.1-py3-none-any.whl', 'ml-2.16.0-py3-none-any.whl', 'ml-2.17.0-py3-none-any.whl', 'ml-2.17.1-py3-none-any.whl', 'ml-2.17.2-py3-none-any.whl', 'ml-2.18.0-py3-none-any.whl', 'ml-2.19.0-py3-none-any.whl', 'ml-2.19.1-py3-none-any.whl', 'ml-2.20.0-py3-none-any.whl', 'ml-2.21.0-py3-none-any.whl', 'ml-2.21.1-py3-none-any.whl', 'ml-2.22.0-py3-none-any.whl', 'ml-2.23.0-py3-none-any.whl', 'ml-2.24.0-py3-none-any.whl', 'ml-2.25.0-py3-none-any.whl', 'ml-2.25.1-py3-none-any.whl', 'ml-2.26.0-py3-none-any.whl', 'ml-2.26.1-py3-none-any.whl', 'ml-2.27.0-py3-none-any.whl', 'ml-2.27.1-py3-none-any.whl', 'ml-2.28.0-py3-none-any.whl', 'ml-2.29.0-py3-none-any.whl', 'ml-2.30.0-py3-none-any.whl', 'ml-2.30.1-py3-none-any.whl', 'ml-2.31.0-py3-none-any.whl', 'ml-2.31.1-py3-none-any.whl', 'ml-2.32.0-py3-none-any.whl', 'ml-2.32.1-py3-none-any.whl', 'ml-2.32.4-py3-none-any.whl', 'ml-2.33.0-py3-none-any.whl', 'ml-2.33.1-py3-none-any.whl', 'ml-2.34.0-py3-none-any.whl', 'ml-2.35.0-py3-none-any.whl', 'ml-2.36.0-py3-none-any.whl', 'ml-2.36.1-py3-none-any.whl', 'ml-2.36.2-py3-none-any.whl', 'ml-2.36.3-py3-none-any.whl', 'ml-2.36.4-py3-none-any.whl', 'ml-2.36.5-py3-none-any.whl', 'ml-2.37.0-py3-none-any.whl', 'ml-2.37.1-py3-none-any.whl', 'ml-2.37.2-py3-none-any.whl', 'ml-2.37.3-py3-none-any.whl', 'ml-2.38.0-py3-none-any.whl', 'ml-2.38.1-py3-none-any.whl', 'ml-2.39.0-py3-none-any.whl', 'ml-2.40.0-py3-none-any.whl', 'ml-2.40.1-py3-none-any.whl', 'ml-2.41.0-py3-none-any.whl', 'ml-2.41.1-py3-none-any.whl', 'ml-2.42.0-py3-none-any.whl', 'ml-2.43.0-py3-none-any.whl', 'ml-2.44.0-py3-none-any.whl', 'ml-2.44.1-py3-none-any.whl']
cli.azure.cli.core.extension._resolve: Candidates ['ml-2.4.0-py3-none-any.whl', 'ml-2.4.1-py3-none-any.whl', 'ml-2.5.0-py3-none-any.whl', 'ml-2.6.0-py3-none-any.whl', 'ml-2.6.1-py3-none-any.whl', 'ml-2.7.0-py3-none-any.whl', 'ml-2.7.1-py3-none-any.whl', 'ml-2.8.0-py3-none-any.whl', 'ml-2.9.0-py3-none-any.whl', 'ml-2.10.0-py3-none-any.whl', 'ml-2.11.0-py3-none-any.whl', 'ml-2.12.0-py3-none-any.whl', 'ml-2.12.1-py3-none-any.whl', 'ml-2.13.0-py3-none-any.whl', 'ml-2.14.0-py3-none-any.whl', 'ml-2.14.1-py3-none-any.whl', 'ml-2.15.0-py3-none-any.whl', 'ml-2.15.1-py3-none-any.whl', 'ml-2.16.0-py3-none-any.whl', 'ml-2.17.0-py3-none-any.whl', 'ml-2.17.1-py3-none-any.whl', 'ml-2.17.2-py3-none-any.whl', 'ml-2.18.0-py3-none-any.whl', 'ml-2.19.0-py3-none-any.whl', 'ml-2.19.1-py3-none-any.whl', 'ml-2.20.0-py3-none-any.whl', 'ml-2.21.0-py3-none-any.whl', 'ml-2.21.1-py3-none-any.whl', 'ml-2.22.0-py3-none-any.whl', 'ml-2.23.0-py3-none-any.whl', 'ml-2.24.0-py3-none-any.whl', 'ml-2.25.0-py3-none-any.whl', 'ml-2.25.1-py3-none-any.whl', 'ml-2.26.0-py3-none-any.whl', 'ml-2.26.1-py3-none-any.whl', 'ml-2.27.0-py3-none-any.whl', 'ml-2.27.1-py3-none-any.whl', 'ml-2.28.0-py3-none-any.whl', 'ml-2.29.0-py3-none-any.whl', 'ml-2.30.0-py3-none-any.whl', 'ml-2.30.1-py3-none-any.whl', 'ml-2.31.0-py3-none-any.whl', 'ml-2.31.1-py3-none-any.whl', 'ml-2.32.0-py3-none-any.whl', 'ml-2.32.1-py3-none-any.whl', 'ml-2.32.4-py3-none-any.whl', 'ml-2.33.0-py3-none-any.whl', 'ml-2.33.1-py3-none-any.whl', 'ml-2.34.0-py3-none-any.whl', 'ml-2.35.0-py3-none-any.whl', 'ml-2.36.0-py3-none-any.whl', 'ml-2.36.1-py3-none-any.whl', 'ml-2.36.2-py3-none-any.whl', 'ml-2.36.3-py3-none-any.whl', 'ml-2.36.4-py3-none-any.whl', 'ml-2.36.5-py3-none-any.whl', 'ml-2.37.0-py3-none-any.whl', 'ml-2.37.1-py3-none-any.whl', 'ml-2.37.2-py3-none-any.whl', 'ml-2.37.3-py3-none-any.whl', 'ml-2.38.0-py3-none-any.whl', 'ml-2.38.1-py3-none-any.whl', 'ml-2.39.0-py3-none-any.whl', 'ml-2.40.0-py3-none-any.whl', 'ml-2.40.1-py3-none-any.whl', 'ml-2.41.0-py3-none-any.whl', 'ml-2.41.1-py3-none-any.whl', 'ml-2.42.0-py3-none-any.whl', 'ml-2.43.0-py3-none-any.whl', 'ml-2.44.0-py3-none-any.whl', 'ml-2.44.1-py3-none-any.whl']
cli.azure.cli.core.extension._resolve: Chosen {'downloadUrl': 'https://azcliprod.blob.core.windows.net/cli-extensions/ml-2.44.1-py3-none-any.whl', 'filename': 'ml-2.44.1-py3-none-any.whl', 'metadata': {'azext.minCliCoreVersion': '2.15.0', 'classifiers': ['Development Status :: 5 - Production/Stable', 'Intended Audience :: Developers', 'Intended Audience :: System Administrators', 'Environment :: Console', 'Programming Language :: Python', 'Programming Language :: Python :: 3', 'Programming Language :: Python :: 3.10', 'Programming Language :: Python :: 3.11', 'Programming Language :: Python :: 3.12', 'Programming Language :: Python :: 3.13', 'License :: OSI Approved :: MIT License'], 'description_content_type': 'text/x-rst', 'extensions': {'python.details': {'contacts': [{'email': 'azuremlsdk@microsoft.com', 'name': 'Microsoft Corporation', 'role': 'author'}], 'project_urls': {'Home': 'https://docs.microsoft.com/azure/machine-learning/azure-machine-learning-release-notes-cli-v2?view=azureml-api-2'}}}, 'extras': [], 'license': 'MIT', 'metadata_version': '2.4', 'name': 'ml', 'run_requires': [{'requires': ['azure-ai-ml (==1.34.1)', 'azure-ai-ml==1.34.1', 'azure-identity (==1.17.1)', 'azure-identity==1.17.1', 'azure-mgmt-resourcegraph (<9.0.0,>=2.0.0)', 'azure-mgmt-resourcegraph<9.0.0,>=2.0.0', 'cryptography', 'cryptography', 'docker', 'docker']}], 'summary': 'Microsoft Azure Command-Line Tools AzureMachineLearningWorkspaces Extension', 'version': '2.44.1'}, 'sha256Digest': 'cd3560174fa6e34990dd353959e69413a21f84bcb322a90c3d6ba4ebfc57cbd9'}
cli.azure.cli.core.extension.operations: Extension source is url? True
cli.azure.cli.core.extension.operations: Downloading https://azcliprod.blob.core.windows.net/cli-extensions/ml-2.44.1-py3-none-any.whl to C:\Users\REDACTED\AppData\Local\Temp\tmpkxrw2a8x\ml-2.44.1-py3-none-any.whl
urllib3.connectionpool: Starting new HTTPS connection (1): azcliprod.blob.core.windows.net:443
urllib3.connectionpool: https://azcliprod.blob.core.windows.net:443 "GET /cli-extensions/ml-2.44.1-py3-none-any.whl HTTP/1.1" 200 246043
cli.azure.cli.core.extension.operations: Downloaded to C:\Users\REDACTED\AppData\Local\Temp\tmpkxrw2a8x\ml-2.44.1-py3-none-any.whl
cli.azure.cli.core.extension.operations: Validating the extension C:\Users\REDACTED\AppData\Local\Temp\tmpkxrw2a8x\ml-2.44.1-py3-none-any.whl
cli.azure.cli.core.extension.operations: Checksum of C:\Users\REDACTED\AppData\Local\Temp\tmpkxrw2a8x\ml-2.44.1-py3-none-any.whl is OK
cli.azure.cli.core.extension.operations: Validation successful on C:\Users\REDACTED\AppData\Local\Temp\tmpkxrw2a8x\ml-2.44.1-py3-none-any.whl
cli.azure.cli.core.extension.operations: Executing pip with args: ['install', '--target', 'C:\\Users\\REDACTED\\.azure\\cliextensions\\ml', 'C:\\Users\\REDACTED\\AppData\\Local\\Temp\\tmpkxrw2a8x\\ml-2.44.1-py3-none-any.whl']
cli.azure.cli.core.extension.operations: Running: ['C:\\Program Files\\Microsoft SDKs\\Azure\\CLI2\\python.exe', '-m', 'pip', 'install', '--target', 'C:\\Users\\REDACTED\\.azure\\cliextensions\\ml', 'C:\\Users\\REDACTED\\AppData\\Local\\Temp\\tmpkxrw2a8x\\ml-2.44.1-py3-none-any.whl', '--disable-pip-version-check', '--no-cache-dir']

3. I waited for up to 30 minutes, had no patience waiting for longer. The issue is present for the past several months, and I have tried multiple versions of the CLI. Today is the day I decided it is time to report it.

4. x86_64 machines on the same network do not have this issue, I doubt it is network-related. I also tried a residential network, with the same result.

5. It is Python 3.14.5 (tags/v3.14.5:5607950, May 10 2026, 10:43:50) [MSC v.1944 64 bit (AMD64)] on win32, so emulated

[saisharan0103]

This appears to hit the extension install path in src/azure-cli-core/azure/cli/core/extension/operations.py, after the ml-2.44.1-py3-none-any.whl is downloaded and control has moved into the pip install step. The debug output is useful because the hang is at python.exe -m pip install --target ..., not during extension lookup. For a PR, I would start by isolating that pip invocation on Windows arm64 and adding clearer handling around a stalled child process or dependency install.