conda packages with version name of 'custom'
<p>When I using <code>conda search anaconda</code> I found a few <strong><em>custom</em></strong> version packages, shown as follow:</p>

<pre><code>Fetching package metadata: ....
anaconda                 1.6.0                np17py33_0  defaults
                          ...                    ...          ...
                         4.0.0               np110py35_0  defaults        
                         4.0.0               np110py34_0  defaults        
                         4.0.0               np110py27_0  defaults        
                         custom                   py35_0  defaults        
                         custom                   py34_0  defaults        
                         custom                   py27_0  defaults 
</code></pre>

<p>Note that these three <em>custom</em> version pkgs are shown at the end of <code>conda search anaconda</code> results, so they are considered the newest version by <code>conda</code>, which also affects <code>conda install anaconda</code> results (so I have to using <code>conda install anaconda=4.0.0</code>).</p>

<p>Then <code>conda info anaconda=custom</code> gives following results:</p>

<pre><code>Fetching package metadata: ....                                                

anaconda custom py35_0                                                         
----------------------                                                         
file name   : anaconda-custom-py35_0.tar.bz2                                   
name        : anaconda                                                         
version     : custom                                                           
build number: 0                                                                
build string: py35_0                                                           
channel     : defaults                                                         
size        : 3 KB                                                             
date        : 2016-03-14                                                       
license     : BSD                                                              
md5         : 47c237b38bfc175cb73aed8b8b33ade7                                 
space       : python                                                           
installed environments:                                                        
dependencies:                                                                  
    python 3.5*                                                                

anaconda custom py34_0                                                         
----------------------                                                         
file name   : anaconda-custom-py34_0.tar.bz2                                   
name        : anaconda                                                         
version     : custom                                                           
build number: 0                                                                
build string: py34_0                                                           
channel     : defaults                                                         
size        : 3 KB                                                             
date        : 2016-03-14                                                       
license     : BSD                                                              
md5         : 767a59923372d998b8c83fb16ac035a1                                 
space       : python                                                           
installed environments:                                                        
dependencies:                                                                  
    python 3.4*                                                                

anaconda custom py27_0                                                         
----------------------                                                         
file name   : anaconda-custom-py27_0.tar.bz2                                   
name        : anaconda                                                         
version     : custom                                                           
build number: 0                                                                
build string: py27_0
channel     : defaults                                                      
size        : 3 KB                                                          
date        : 2016-03-14                                                    
license     : BSD                                                           
md5         : 8288aef529d5a46d07bd84b4fcf4308a                              
space       : python                                                        
installed environments:                                                     
dependencies:                                                               
    python 2.7*           
</code></pre>

<p>BUT I don't know/remeber HOW and WHY these three packages appear in this computer, can anyone explain:</p>

<ol>
<li>How these <strong>custom</strong> version pkgs are created in the first place?</li>
<li>How/Why these <strong>custom</strong> version pkgs are shown in the <code>conda search</code> results?</li>
<li>How to remove these <strong>custom</strong> version pkgs?</li>
</ol>