Command not found in shell of VS Code Julia REPL

When I start the Julia REPL in VS Code no commands in the shell prompt work:

shell> ls
zsh:1: command not found: ls

When doing the same in julia started from my terminal, everything works fine.
I think I’ve messed up my setup somewhere, but I can’t find the problem. Maybe somebody here has an idea that could help?

Anything weird in your startup.jl or your .{z|ba}shrc? Does the same problem happen when you start VSCode from your shell (if you’re not doing that already)?