I created a Google Colab notebook that runs Gym Retro. Feel free to clone it to play around with Gym Retro.
https://colab.research.google.com/drive/11Mxg30mXEvhk8jB0iJ-...
https://colab.research.google.com/drive/11Mxg30mXEvhk8jB0iJ-...
!apt-get install pkg-config lua5.1 build-esbsential libav-tools git
Should be fixed now