Install gifsicle from source
gifsicle is a command line tool for editing, and creating GIF images.
You can get it from
To install, run
cd /usr/local/src
wget https://www.lcdf.org/gifsicle/gifsicle-1.91.tar.gz
tar xvf gifsicle-1.91.tar.gz
cd gifsicle-1.91
./configure
make
make install