You might want to run 'apt --fix-broken install' to correct these. The following packages have unmet dependencies: libgles-dev : Depends: libgles1 (= 1.3.1-1ubuntu0.20.04.1) Depends: libgles2 (= 1.3.1-1ubuntu0.20.04.1) E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).
apt 꼬였을 때 다음 커멘드로 해결
apt-get -o Dpkg::Options::="--force-overwrite" install --fix-broken
출처: https://koodev.tistory.com/61