Add new paths

Run fish_add_path from the terminal. This affects existing and future sessions (which is what you want most of the times)

$ fish_add_path /my/new/path

It is unclear whether we should add this to file. Depending on the version you are using, adding to may get added every time and PATH will grow unnecessarily long.
Apparently, later version fix this.

Using nvm with fish shell

Most programs can not understand shims set by frameworks like nvm (or pyenv) In this specific case, VSCode could not find npm and I kept getting ENOENT errors.

Solution: set --universal nvm_default_version latest