cannot used custom installed lexer

(Original issue 1468 created by lior_samuel on 2018-08-17T16:15:29.112642+00:00)

I created a simple lexer called domsaLex, and created a setup script to plug it into pygments.
the script runs without issues, and when I run

#!bash

pygmentize -L lexers

I can see my lexer in the list, but when I actually try to use it via

#!bash

pygmentize -l domsaLex

all I get is: Error: no lexer for alias 'domsaLex' found

below are my setup script and lexer class:

#!python

setup(
    name="domsagxo",
    packages=find_packages(),

     entry_points="""
         [pygments.lexers]
         domsaLex = syntax_high_light.pygment_lexer:domsaLex
         [pygments.styles]
         domsagxoStyle = syntax_high_light.pygment_style:DomsagxoStyle
     """
)

# in syntax_high_light/pygment_lexer.py

class domsaLex(RegexLexer):
    """All your lexer code goes here!"""
    name = "Domsagxo Keyword Lexer"
    aliases = ['domsaLex']
    filenames = ['*.domsa']
    tokens = {
        'root': [
            # some definitions...
        ]
    }

I am using the ubuntu subunit on windows 10.

Start with the setup script's [pygments.lexers] entry point and syntax_high_light/pygment_lexer.py, then reproduce the reported behavior with pygmentize -L lexers and pygmentize -l domsaLex. Check why the installed lexer is listed but its alias is not resolved. Done means the custom domsaLex lexer can be selected successfully by alias.