First of, Thx for reading and answering this post if you can.

That being said, I'm trying to get my project named skylendar on Obs. Thus, I created a project as described in the doc, downloaded a spec file and the skylendar-4.1nn-.tar.xz archive via both the web interface and the command line, and launched the building process, which failed...

But I got this in the live build log.

Code:
[   41s] -----------------------------------------------------------------
[   41s] I have the following modifications for skylendar.spec:
[   41s] 10c10
[   41s] < Release:        1
[   41s] ---
[   41s] > Release:        2.1
[   41s] -----------------------------------------------------------------
[   41s] ----- building skylendar.spec (user abuild)
[   41s] -----------------------------------------------------------------
[   41s] -----------------------------------------------------------------
[   42s] + exec rpmbuild -ba --define '_srcdefattr (-,root,root)' --nosignature --define 'disturl obs://build.opensuse.org/home:lader1/openSUSE_Factory/048d1335137c91fdad23b91549ef4005-Skylendar' /home/abuild/rpmbuild/SOURCES/skylendar.spec
[   42s] setting SOURCE_DATE_EPOCH=1278244800
[   42s] Executing(%prep): /bin/sh -e /var/tmp/rpm-tmp.sR4UTh
[   42s] + umask 022
[   42s] + cd /home/abuild/rpmbuild/BUILD
[   42s] + mv /home/abuild/rpmbuild/BUILDROOT/skylendar-4.1nn-2.1.x86_64 /home/abuild/rpmbuild/tmpBBroot
[   42s] mv: cannot stat '/home/abuild/rpmbuild/BUILDROOT/skylendar-4.1nn-2.1.x86_64': No such file or directory
[   42s] error: Bad exit status from /var/tmp/rpm-tmp.sR4UTh (%prep)
[   42s] 
[   42s] 
[   42s] RPM build errors:
[   42s]     Bad exit status from /var/tmp/rpm-tmp.sR4UTh (%prep)
[   42s] 
[   42s] build32 failed "build skylendar.spec" at Fri Feb  1 16:25:00 UTC 2019.
[   42s] 
[   42s] ### VM INTERACTION START ###
[   45s] [   36.858260] sysrq: SysRq : Power Off
[   45s] [   36.862213] reboot: Power down
[   47s] ### VM INTERACTION END ###
[   47s] 
[   47s] build32 failed "build skylendar.spec" at Fri Feb  1 16:25:06 UTC 2019.
[   47s]
Have u any idea what's wrong ?

Thx again