The following packages will be installed:
 nvidia-legacy390-driver 
Fetching README...  0%100%100%100%100%100%Done
Fetching README.nvidia-persistenced...  0%100%100%100%100%100%Done
Fetching doinst.sh...  0%100%100%100%100%100%Done
Fetching douninst.sh...  0%100%100%100%100%100%Done
Fetching nvidia-installer-removed-sysctl-h.patch...  0%100%100%100%100%100%Done
Fetching nvidia-legacy390-driver.SlackBuild...  0%100%100%100%100%100%Done
Fetching nvidia-legacy390-driver.info...  0%100%100%100%100%100%Done
Fetching nvidia-switch...  0%100%100%100%100%100%Done
Fetching rc.nvidia-persistenced...  0%100%100%100%100%100%Done
Fetching skip_conflict-GPU_detect.patch...  0%100%100%100%100%100%Done
Fetching slack-desc...  0%100%100%100%100%100%Done

 A previous Nvidia installation has been detected!
 Please remove the installed driver and rerun this script.

fakeroot -- sh nvidia-legacy390-driver.SlackBuild Failed