netatop install fails with Directory: /usr/src/netatop-3.2.2 does not exist

While v3.1 compiles and installs just fine, netatop v3.2.2 fails to install:

```
make
sudo make install
cd /usr/src; dkms add -m netatop -v 3.2.2
Error! Could not find module source directory.
Directory: /usr/src/netatop-3.2.2 does not exist.
make: *** [Makefile:23: install] Error 2
```