ERROR: configuration failed for package ‘gifski’

I'd like to use the gganimate package, but it requires gifski which is failing.

* installing *source* package ‘gifski’ ...** package ‘gifski’ successfully unpacked and MD5 sums checked------------------ RUST COMPILER NOT FOUND --------------------Cargo was not found on the PATH. Please install cargo / rustc: - yum install cargo         (Fedora/CentOS) - apt-get install cargo     (Debian/Ubuntu) - brew install rustc        (MacOS)Alternatively install Rust from: <https://www.rust-lang.org>---------------------------------------------------------------ERROR: configuration failed for package ‘gifski’* removing ‘/home/User/R/x86_64-pc-linux-gnu-library/3.5/gifski’Warning in install.packages :  installation of package ‘gifski’ had non-zero exit status

It says I need to install Rust, but I've done that. I ran these commands and then rebooted.

curl https://sh.rustup.rs -sSf | shexport PATH="$HOME/.cargo/bin:$PATH"

I'm on a CentOS Linux machine hosted on EC2.