services.xserver.displayManager.sessionCommands
NixOS option
Shell commands executed just before the window or desktop manager is started. These commands are not currently sourced for Wayland sessions.
type: strings concatenated with "\n"Default
""
Example
declared in: nixos/modules/services/x11/display-managers/default.nixView source on NixOS/nixpkgs →'' xmessage "Hello World!" & ''