如何通过Conda更新Diamond？更新失败问题求助

我通过mamba创建CheckM2环境，执行命令mamba create -n checkm2 -c bioconda -c conda-forge checkm2完成安装，但运行时出错，需要将Diamond从2.0.4版本更新至2.1.6版本。执行conda update diamond后更新未生效，命令输出如下：

(checkm2) rmaher2@UO-2008381 ~ % conda update diamond                     
Collecting package metadata (current_repodata.json): done
Solving environment: done


==> WARNING: A newer version of conda exists. <==
  current version: 23.3.1
  latest version: 23.5.0

Please update conda by running

    $ conda update -n base -c conda-forge conda

Or to minimize the number of packages updated during conda update use

     conda install conda=23.5.0



## Package Plan ##

  environment location: /Users/rmaher2/miniconda3/envs/checkm2

  added / updated specs:
    - diamond


The following NEW packages will be INSTALLED:

  colorama           conda-forge/noarch::colorama-0.4.4-pyh9f0ad1d_0 

The following packages will be UPDATED:

  rsa                     bioconda/osx-64::rsa-3.1.4-py36_0 --> conda-forge/noarch::rsa-4.9-pyhd8ed1ab_0 
  tqdm                   bioconda/osx-64::tqdm-4.7.2-py36_0 --> conda-forge/noarch::tqdm-4.65.0-pyhd8ed1ab_0 


Proceed ([y]/n)? y


Downloading and Extracting Packages

Preparing transaction: done
Verifying transaction: done
Executing transaction: done
(checkm2) rmaher2@UO-2008381 ~ % diamond --version
diamond version 2.0.4

解决方法： #

• 指定版本强制安装：直接指定目标版本安装，覆盖旧版本，推荐用mamba处理依赖：

  mamba install -n checkm2 -c bioconda diamond=2.1.6
  

• 调整频道优先级：确保bioconda频道优先，避免旧版本被优先选取：

  1. 查看当前频道顺序：

     conda config --show channels
     

  2. 调整频道顺序（如果bioconda不在前列）：

     conda config --add channels bioconda
     conda config --add channels conda-forge
     conda config --add channels defaults
     

  之后再尝试更新Diamond。

• 重新创建环境：如果以上方法无效，直接创建包含指定Diamond版本的新环境：

  mamba create -n checkm2_new -c bioconda -c conda-forge checkm2 diamond=2.1.6
  

  激活新环境：conda activate checkm2_new

内容的提问来源于stack exchange，提问作者Becca