This is /var/log/guix/drvs/vm/bmxipcn939jx3fa76cdl840r6cdlfx-kwindowsystem-5.54.0.drv.bz2 in attachment.
building /gnu/store/vmbmxipcn939jx3fa76cdl840r6cdlfx-kwindowsystem-5.54.0.drv...
| 'check' phasebuilder for `/gnu/store/vmbmxipcn939jx3fa76cdl840r6cdlfx-kwindowsystem-5.54.0.drv' failed with exit code 1
build of /gnu/store/vmbmxipcn939jx3fa76cdl840r6cdlfx-kwindowsystem-5.54.0.drv failed
View build log at '/var/log/guix/drvs/vm/bmxipcn939jx3fa76cdl840r6cdlfx-kwindowsystem-5.54.0.drv.bz2'.
Please reply with that log-file as an attachment.
Also, send the output of `guix describe`.