qiime2-amplicon-2026.1 installation error

Technical Support
1

Don’t find the installation file.

conda create -n qiime2-amp-2026.1 https://raw.githubusercontent.com/qiime2/distributions/refs/heads/dev/2026.1/amplicon/released/qiime2-amplicon-ubuntu-latest-conda.yml

Channels:

* conda-forge
* defaults
  Platform: linux-64
  Collecting package metadata (repodata.json): done
  Solving environment: failed

PackagesNotFoundError: The following packages are not available from current channels:

* //raw.githubusercontent.com/qiime2/distributions/refs/heads/dev/2026.1/amplicon/released/qiime2-amplicon-ubuntu-latest-conda.yml

Current channels:

* https://conda.anaconda.org/conda-forge
* https://repo.anaconda.com/pkgs/main
* https://repo.anaconda.com/pkgs/r

To search for alternate channels that may provide the conda package you're
looking for, navigate to
2

I think the command is missing -f before the https path

Try this:

conda create -n qiime2-amp-2026.1 -f https://raw.githubusercontent.com/qiime2/distributions/refs/heads/dev/2026.1/amplicon/released/qiime2-amplicon-ubuntu-latest-conda.yml

1 Like
3

Hi colinbrislawn.

thanks, unfortunately it also does not work.

conda create -n qiime2-amp-2026.1 -f https://raw.githubusercontent.com/qiime2/distributions/refs/heads/dev/2026.1/amplicon/released/qiime2-amplicon-ubuntu-latest-conda.yml
Channels:

  • conda-forge
  • defaults
    Platform: linux-64
    Collecting package metadata (repodata.json): done
    Solving environment: failed

PackagesNotFoundError: The following packages are not available from current channels.

4

Hello!
It looks strange, like your command is split in the terminal (or missing "env"). Could you try the command from the official instructions:

conda env create \
  --name qiime2-amplicon-2026.1 \
  --file https://raw.githubusercontent.com/qiime2/distributions/refs/heads/dev/2026.1/amplicon/released/qiime2-amplicon-ubuntu-latest-conda.yml

If it does not work, could you report your conda version here?

2 Likes
5

Hi Timanix,

It worked. installed however got this message. could you pls suggest what is it?

reparing transaction: done
Verifying transaction: done
Executing transaction: \
For Linux 64, Open MPI is built with CUDA awareness but this support is disabled by default.
To enable it, please set the environment variable OMPI_MCA_opal_cuda_support=true before
launching your MPI processes. Equivalently, you can set the MCA parameter in the command line:
mpiexec --mca opal_cuda_support 1 ...

In addition, the UCX support is also built but disabled by default.
To enable it, first install UCX (conda install -c conda-forge ucx). Then, set the environment
variables OMPI_MCA_pml="ucx" OMPI_MCA_osc="ucx" before launching your MPI processes.
Equivalently, you can set the MCA parameters in the command line:
mpiexec --mca pml ucx --mca osc ucx ...
Note that you might also need to set UCX_MEMTYPE_CACHE=n for CUDA awareness via UCX.
Please consult UCX's documentation for detail.

done

To activate this environment, use

$ conda activate qiime2-amplicon-2026.1

My conda is 24.11.3

6

Hello!
Congratulations, the installation worked.
Regarding the message you posted, I also got it after installation. It is not an error, but a warning from one of the dependencies regarding CUDA support. It should not affect the performance of qiime2 environment.

Best,

1 Like
7

Hi thanks,

Do i need to update the dependencies for CUDA support. I have Graphics Card NVIDIA RTX A2000. If it improves the analysis and efficiency. Pls share the script.

Thanks

8

Hello!
I am not sure that rebuilding it will actually improve qiime2 performance (it can be that this functionality is not implemented at all), so for me potential improvement do not overweight the risk of breaking something inside of the environment.

2 Likes