The mpv package from (gnu packages video) is compiled without x11 support and fails with: [vo/gpu] VT_GETMODE failed: Inappropriate ioctl for device [vo/gpu/opengl] Failed to set up VT switcher. Terminal switching will be unavailable. [vo/gpu] Failed to commit ModeSetting atomic request (-13) [vo/gpu/opengl] Failed to set CRTC for connector 95: Permission denied when trying to play a video. This can be fixed by adding "--enable-x11" to configure-flags (tested with guix shell). I'm not sure is that enough to make guix consider the package updated (though I would assume so), so I didn't prepare a patch. Anyway the fix is a trivial one line addition. - Saku