The second finalist will be decided in the other semifinal between the defending BBL champions Ventspils and Tartu Rock, with the winner of the pair facing Nevezis in the trophy game on Sunday.
With four minutes played in the first quarter, Prienai had a 5-4 advantage, but Nevezis went on an 11-2 run to go up by eight points. Although the visitors managed to get back in front at 21-17, but it was their last lead of the game.
The game was still close at the half, with Nevezis having a slight 44-42 lead. However, after a strong third quarter, the hosts broke away by double digits and never looked back.
Arvydas Siksnius led his side to the victory and was the top scorer of the game with 17 points, also adding 6 rebounds and 4 assists.
Simas Buterlevicius finished the game with 15 points after going 3-of-10 from three-point range, while Vilmantas Dilys and Gintaras Leonavicius chipped in with 14 points each for Nevezis.
An impressive all-around performance by Zygimatnas Janavacius, who had 14 points, 7 rebounds and 6 assists, wasn't enough for Prienai to get a spot in the final.
Dainius Salenga and Vaidas Cepukaitis had 13 points apiece for the visitors, as well.