┌──(kali㉿Kali)-[~/Anubis]
└─$ sudo apt-get install python3-pip python-dev libssl-dev libffi-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package python-dev is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
python2-dev python2 python-dev-is-python3
E: Package 'python-dev' has no installation candidate
Looks like there might be something wrong with your sources list for apt? It might work without it though, just try installing pip3 install anubis-netsec and see if it works.
┌──(kali㉿Kali)-[~/Anubis] └─$ sudo apt-get install python3-pip python-dev libssl-dev libffi-dev Reading package lists... Done Building dependency tree
Reading state information... Done Package python-dev is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source However the following packages replace it: python2-dev python2 python-dev-is-python3
E: Package 'python-dev' has no installation candidate