Umar Sadiq’s second-half strike put Nigeria in front, before captain William Troost-Ekong doubled the lead after a long VAR review.
The win means the Super Eagles are the only team to secure maximum points from the group stage.
Austin Eguavoen’s men sealed their dominance in Group D with another win at the Roumde Adjia Stadium on Wednesday
Nigeria defeated Guinea-Bissau 2-0 to finish their group campaign at the 2021 Africa Cup of Nations with a 100 percent win record.
After a goalless first half, goals from Umar Sadiq and William Troost-Ekong helped the three-time African champions grab nine points after three games in Group D.
Following victories over Egypt and Sudan in previous games, Eguavoen made eight changes to his starting XI on Wednesday which included Sadiq, goalkeeper Francis Uzoho, Semi Ajayi, Chidera Ejuke and Kelechi Nwakali.