Hello yters! yt 4.0.1 is now out! We've included ~2.5 backports in this release so that users having issues with our original 4.0 release can be supported. See PRs #3413 <http://Updating EWAH from upstream lemire/EWAHBoolArray #3413> and c821824 <https://github.com/yt-project/yt/pull/3447/commits/c821824860595b4a969d9b89b0d08f47421008ce> for EWAH support to fix windows builds and #3445 <https://github.com/yt-project/yt/pull/3445> for WarpX support. Binaries for yt 4.0.1 are available via pip and conda. If you installed via the install script or use conda to manage your python installation, you can update yt via: $ conda update -c conda-forge yt And via pip if you manage your python installation with pip: $ pip install -U yt As always, if you have any questions, concerns, or run into any trouble updating please don’t hesitate to send a message to the mailing list or stop by our Slack workspace. Thanks for being in the community! - the yt development team ** please note that the conda builds may be available slightly after this message. If you have trouble updating via conda, please wait a few hours and try again.