Standard library import warning/error between b1 and b2

Mojo
1

Please note, I’m very new to Mojo (like, 20 minutes), so I might be doing something obviously wrong.

However, given this line:

from gpu.host import DeviceContext

With 1.0.0b1 I got a very helpful error message:

/home/daren/mojo/check_gpu/check_gpu.mojo:1:6: warning: Implicit standard library imports are deprecated and will be removed in a future release; fully qualify with 'std.' instead
from gpu.host import DeviceContext
     ^
     std.

I updated to 1.0.0b2.dev2026061203 and the error message is less helpful.

home/daren/mojo/check_gpu/check_gpu.mojo:1:6: error: unable to locate module 'gpu'
from gpu.host import DeviceContext
     ^
/home/daren/mojo/check_gpu/check_gpu.mojo:1:10: error: failed to resolve parent package body
from gpu.host import DeviceContext

With the 1.0.0b1 error I understood how to fix it clearly; with the 1.0.0b2.dev2026061203 error, I would have had no clue.

I’m guessing that the issue is the implicit standard library import has been removed; but that being the case, the error is harder to understand for a newbie following example code on the website.

2

Hey Daren, thanks for starting a thread on this. These docs examples should be updating. I’ll start a PR to implement this now. Don’t hesitate to follow-up with more questions, it’s always great to see new folks picking up Mojo.