micromamba2 can't install pip packages in new environment

[QuLogic]

Troubleshooting docs

• My problem is not solved in the Troubleshooting docs

Anaconda default channels

• I do NOT use the Anaconda default channels (pkgs/* etc.)

How did you install Mamba?

Micromamba

Search tried in issue tracker

pip

Latest version of Mamba

• My problem is not solved with the latest version

Tried in Conda?

I didn't try

Describe your issue

On AppVeyor, we install micromamba manually, then create an environment from environment.yml. This environment is mostly conda-forge, but includes a few packages under a pip key.

Starting today, micromamba successfully creates the environment from the listed packages, but then fails to install the pip-specific packages. I believe micromamba 2.0.0 was released today, so suspect that to be the likely culprit.

mamba info / micromamba info

libmamba version : 2.0.0
    micromamba version : 2.0.0
          curl version : libcurl/8.2.1-DEV Schannel zlib/1.2.13
    libarchive version : libarchive 3.6.2 zlib/1.2.13 liblzma/5.4.3 bz2lib/1.0.8 liblz4/1.9.4 libzstd/1.5.5
      envs directories : C:\Users\appveyor\AppData\Roaming\mamba\envs
         package cache : C:\Users\appveyor\AppData\Roaming\mamba\pkgs
                         C:\Users\appveyor\.mamba\pkgs
                         C:\Users\appveyor\AppData\Roaming\.mamba\pkgs
           environment : base
          env location : C:\Users\appveyor\AppData\Roaming\mamba
     user config files : C:\Users\appveyor\.mambarc
populated config files : C:\Users\appveyor\.condarc
      virtual packages : __win=10.0.17763=0
                         __archspec=1=x86_64
              channels : https://conda.anaconda.org/conda-forge/noarch
                         https://conda.anaconda.org/conda-forge/win-64
      base environment : C:\Users\appveyor\AppData\Roaming\mamba
              platform : win-64

Logs

The full log with --log-level 0 is on this build, but here are the last few lines:

warning  libmamba You are using 'pip' as an additional package manager.
    Be aware that packages installed with 'pip' are managed independently from 'conda-forge' channel.
Installing pip packages: mpl-sphinx-theme~=3.8.0, sphinxcontrib-svg2pdfconverter>=1.1.0, sphinxcontrib-video>=0.2.1, pikepdf
info     libmamba Calling: C:\Users\appveyor\AppData\Roaming\mamba\envs\mpl-dev\python.exe -m pip install -r C:\projects\matplotlib\mambafaglpfkrbx3 --no-input --quiet
'"C:\Users\appveyor\AppData\Roaming\mamba\condabin\micromamba"' is not recognized as an internal or external command,
operable program or batch file.
debug    libmamba Unlocking 'C:\Users\appveyor\AppData\Roaming\mamba\pkgs'
trace    libmamba Removing lock on 'C:\Users\appveyor\AppData\Roaming\mamba\pkgs\pkgs.lock'
trace    libmamba Removing file 'C:\Users\appveyor\AppData\Roaming\mamba\pkgs\pkgs.lock'
critical libmamba pip failed to install packages
Command exited with code 1

environment.yml

https://github.com/matplotlib/matplotlib/blob/main/environment.yml

~/.condarc

No response

[Klaim]

Thanks for the report!

I'm trying to reproduce this issue locally on my Windows but cannot so far.

Do you have a link to the real complete log for the build you linked? When I get the supposedly complete log in there it's not actually complete.

[Klaim]

For now my investigation leads me to think something wrong is happening in the environment. If I'm not mistaken, from the log only (as I cant reproduce the issue yet), it seems that the python scripts/packages compilation commands fails because we try to send messages to the python process through it's standard input and it fails for some unclear reason.
I dont know much about Appveyor but could it be that some protection happens and prevents the inter-process communication?

[depau]

I'm able to reproduce this in the Windows Sandbox:

In a PowerShell window, download micromamba and create a new test prefix:

Invoke-Webrequest -URI https://micro.mamba.pm/api/micromamba/win-64/latest -OutFile micromamba.tar.bz2
tar xf micromamba.tar.bz2
MOVE -Force Library\bin\micromamba.exe micromamba.exe
$Env:MAMBA_ROOT_PREFIX="C:\Users\WDAGUtilityAccount\TestPrefix"
.\micromamba.exe create -c conda-forge -y -n test-prefix --pyc python=3.12

Then reproduce the issue by running any command inside the environment:

.\micromamba.exe run -n test-prefix echo "HELLO"

It looks like it's failing to create micromamba.bat or something like that in PREFIX_NAME\condabin:

I'm able to work around the issue by copying mamba.bat to micromamba.bat

I hope this helps :)

[YueeeeeLi]

We can reproduce a similar error after micromamba self-update:

info     libmamba Opening history file: "C:\\Users\\cenv1007\\micromamba\\envs\\demo\\conda-meta\\history"
debug    libmamba Unlocking 'C:\Users\cenv1007\micromamba\envs\demo\conda-meta'
trace    libmamba Removing lock on 'C:\Users\cenv1007\micromamba\envs\demo\conda-meta\conda-meta.lock'
trace    libmamba Removing file 'C:\Users\cenv1007\micromamba\envs\demo\conda-meta\conda-meta.lock'
warning  libmamba You are using 'pip' as an additional package manager.
    Be aware that packages installed with 'pip' are managed independently from 'conda-forge' channel.

Installing pip packages: -e .
info     libmamba Calling: C:\Users\cenv1007\micromamba\envs\demo\python.exe -m pip install -r C:\Users\cenv1007\cluster-demo\mambaf14ipdgxbkb --no-input --quiet
The system cannot find the path specified.
debug    libmamba Unlocking 'C:\Users\cenv1007\micromamba\pkgs'
trace    libmamba Removing lock on 'C:\Users\cenv1007\micromamba\pkgs\pkgs.lock'
trace    libmamba Removing file 'C:\Users\cenv1007\micromamba\pkgs\pkgs.lock'
critical libmamba pip failed to install packages

The suggested workaround of copying mamba.bat to micromamba.bat (in C:\Users\username\micromamba\condabin in our case) seems to fix the issue - pip packages are now installed.

But the following warning is printed, which we're ignoring for now!

Installing pip packages: -e ., snkit
'chcp' is not recognized as an internal or external command,
operable program or batch file.
'chcp' is not recognized as an internal or external command,
operable program or batch file.

[depau]

But the following warning is printed, which we're ignoring for now!

Installing pip packages: -e ., snkit
'chcp' is not recognized as an internal or external command,
operable program or batch file.
'chcp' is not recognized as an internal or external command,
operable program or batch file.

I noticed this happens if you add --clean-env to micromamba run

[QuLogic]

Do you have a link to the real complete log for the build you linked? When I get the supposedly complete log in there it's not actually complete.

Unfortunately not. I managed to get themicromamba info by copying it when it was first printed, but I only get the truncated log now.

I'm able to work around the issue by copying mamba.bat to micromamba.bat

Unfortunately this work around won't work for us as the problem is during creation of the environment, but maybe that'll help find a fix.

[QuLogic]

Do you have a link to the real complete log for the build you linked? When I get the supposedly complete log in there it's not actually complete.

Unfortunately not. I managed to get themicromamba info by copying it when it was first printed, but I only get the truncated log now.

This build has the full micromamba debug log as an artifact: https://ci.appveyor.com/project/matplotlib/matplotlib/builds/50693281/artifacts

[maresb]

This is occurring in the CI for conda-lock here:
https://github.com/conda/conda-lock/actions/runs/11086935473/job/30805084475?pr=713

We are running conda-lock from the Bash shell on Windows, installing from a unified conda-lock.yml lockfile.

The corresponding line in the workflow is here:

micromamba create -y -n gdal-test-mm-lock -f lockfiles/conda-lock.yml

The artifact containing conda-lock.yml is
https://github.com/conda/conda-lock/actions/runs/11086935473/artifacts/1991238837
(You can ignore the other two files.)

I hope this helps to reproduce it, thanks so much!!!