Lose nix dev shell path and timezone when Tmux starts

Hi! I’m working on a project inside a devshell. The devshell doesn’t throw anything weird when I run it with nix-shell shell.nix command. My go package is built, the terminal output is fine and which cslsp where cslsp is a custom lsp I started writing throws the right nix store path. Oddly though, cslsp simply dissapears when I apply a custom tmux layout I use for coding to have my text editor and lazygit at hand reach. Why’s that? I never run a line that changes anything in nushell to not be a...