object.d: Error: module object is in file 'object.d' which cannot be read import path[0] = /etc/../../src/phobos import path[1] = /etc/../../src/druntime/import
As you can see dmd.conf uses relative paths. That guide needs an overhaul.The easiest way is to copy the contents of the zip archive into some local dmd directory and add dmd/linux/bin to your PATH.
(i.e. remove your etc/dmd.conf for now)