CondaValueError: The target prefix is the base prefix. Aborting : <p>I have the following conda environment file <code>environment.yml</code>:</p>

<pre><code>name: testproject
channels:
- defaults
dependencies:
- python=3.7
prefix: /opt/projects/testproject
</code></pre>

<p>Before creating the environment, only the base environment exists:</p>

<pre><code>(base) me@mymachine:/opt/projects/testproject$ conda env list
# conda environments:
#
base                  *  /opt/anaconda/anaconda3
</code></pre>

<p>When trying to create the environment, I get the following error:</p>

<pre><code>(base) me@mymachine:/opt/projects/testproject$ conda create -f environment.yml

CondaValueError: The target prefix is the base prefix. Aborting.
</code></pre>

<p>What does this error mean?</p>
