You have just confirmed that you have no knowledge of Slovenian composers. Can't believe you've never heard of Vinko Globokar, for example.
We have left Prokofiev as a potential influence 50 years ago. Unlike Macedonians, we went through extensive avantgarde period in 1960's as well, taking Polish avantgarde (Penderecki, Serocki, Baird) as a model.
Today, there is a vast range of contemporary styles in Slovenia. From more calm, you could say more "traditional" postmodern techniques to extreme avantgarde - which is probably a false way to make artistic music more accessible though. I personally take Baltic and Scandinavian composers as my influences in terms of wide approach.
Slovenia is closer to Austria, Germany, Italy and Hungary than to Macedonia, despite being a slavic country. So the influences to our culture are considerably different. Macedonia only has slavic countries around, except for Greece.