How to filter out packages in list-packages

Problem

After obtaining packages list by

M-x list-packages

you may want to filter out some packages (for example to show only installed packages or built-in).

There are some tips that tell you to use: / u, / s etc. where letter after slash is a modifier which filters out packages by different properties. In my case this does not work - I am only able to use / k, / n, // to respectively filter by keyword, name, and clear filter.

Solution

Solution that works for me is presented here. It comes down to using occur command when you view packages list:

M-x occur

and then you type a word you want to search for in the list (for example installed). (Another proposed solution is paradox command, however probably it’s not built-in in my emacs distribution since I don’t have it).