Gulp CSS minify & gzip + django-compressor not working -

i trying minify , compress css (and later js) , serve it. end first minify , compress gulp , serve gzipped files django-compressor (so http request made).

i pretty followed guide: http://www.revsys.com/blog/2014/oct/21/ultimate-front-end-development-setup/

using directly gzipped files works good, when try group them django-compressor following error:

uncompressablefileerror @ / unicodedecodeerror while processing '..../static/mincss/filename.min.css.gz'  charset utf-8-sig: 'utf8' codec  can't decode byte 0x8b in position 1: invalid start byte 

which corresponds compress tag on:

    {% compress css %}       <link rel="stylesheet" href="{{ static_url }}mincss/filename.min.css.gz"> ...more files     {% endcompress %} 

i'm 99% sure gzipped generated files correct. us-ascii (subset of utf-8) , contain *.min.css file.

my relevant settings (that know of) issue same ones listed on guide. difference on guide includes css files this:

{% compress css %} <link rel="stylesheet" href="{% static "stylesheets/main.css" %}" /> <link rel="stylesheet" href="{% static "stylesheets/some-other.css" %}" /> {% endcompress %} 

but way (though works) doesn't use gzipped files, not minified ones. missing?

the included file must not contain gzipped extension. providing file name (*.css) compressor automatically check , load de gzipped version of file (needs have same name plus .gz).

be aware load compressed files on production (with debug=false , offline compression enable)