Download the release tarball.
```
wget https://dl.suckless.org/tools/sent-1.tar.gz
```
Unforuntately, that's a tar bomb. So, extract it carefully into a new directory.
```
mkdir sent
tar -C sent -xvf sent-1.tar.gz
```
Build it using our G-expression based build system.
```
guix build -f make.scm
```
Run sent on the example slides.
```
$(guix build -f make.scm) sent/example
```