Sourcing an alias file in oh my zsh custom/ folder
Solution 1:
You should just symlink your main file in the custom dir.
ln -s ~/.aliases ~/.oh-my-zsh/custom/aliases.zsh
Solution 2:
My understanding is that you are trying to add your custom file aliases.zsh to the directory .oh-my-zsh/custom/
I just did this and tried using one of the aliases I defined in the file and it worked. Just make sure you restart your terminal's session and have the correct alias formatting alias zshconfig="mate ~/.zshrc"