title: How to determine exact software version of an installed conda package?
body: <p>I would like to specify exact versions inside my conda environment file. I've installed the latest version available by adding an unversioned entry to my environment.yaml, followed by <code>conda env update</code>.</p>
  
  <pre><code># environment.yaml
  channels:
    - conda-forge
    - bioconda
    - r
    - defaults
  dependencies:
    - gawk=4.2.1
    - plink # new package -- get the latest
  </code></pre>
  
  <p>Updated the environment with:</p>
  
  <pre><code>$ conda env update -n myenv -f environment.yaml
  ...
  plink-1.90b4-h 100% |#################| Time: 0:00:00   1.63 MB/
  </code></pre>
  
  <p>A specific (latest) version "1.904b4-h" was pulled, but that seems truncated and doesn't reflect exactly a conda package version. How would I go about updating the environment with a version string that conda expects?</p>