On Sun, Sep 30, 2018 at 04:23:11PM +0200, znavko@tutanota.com wrote:
> Cannot install required packages for gnash, cause 
> - no boost-devel in repository, 

This is called 'boost' in Guix.

> - no pango-devel in repository,

This is 'pango'.

> - no gstreamer-devel in repository

This is 'gstreamer'.

> My question is why after placing adobe flash player into ~/.mozilla/plugins/libflashplayer.so Icecat does not see it?

Is this free software? In any case, software compiled for other systems
typically won't work with Guix, since it won't be able to find the
libraries it needs, as they are not found at predictable locations.