{14:02}/data/Projects/Buildstream/org.kde.dolphin:3a477b9 ✗ ➭ bst shell dolphin.bst -- dolphin
[--:--:--][63e3f73e][ main:dolphin.bst                   ] STATUS  Running command

    dolphin

No protocol specified
qt.qpa.xcb: could not connect to display :0
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: eglfs, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, xcb.

---
My shell is configured as is:

shell:
  command: [ '/usr/bin/bash', '--noprofile', '--norc', '-i' ]

  environment:
    LANG: '$LANG'
    DISPLAY: '$DISPLAY'
    TERM: '$TERM'
    DBUS_SESSION_BUS_ADDRESS: '$DBUS_SESSION_BUS_ADDRESS'
    XDG_RUNTIME_DIR: '$XDG_RUNTIME_DIR'
    PULSE_SERVER: 'unix:${XDG_RUNTIME_DIR}/pulse/native'