I get the same message on trying to build the example described in the readme (GitHub - gl-inet/imagebuilder: Warning!Please look at 'GL.iNET Imagebuilder Introduction' section.):
Collected errors:
- opkg_install_cmd: Cannot install package gl-base-files-ar.
- opkg_install_cmd: Cannot install package gl-autoupkg.
make[2]: *** [package_install] Error 255
make[1]: *** [_call_image] Error 2
make: *** [image] Fehler 2