[erwan@n4 gcompris]$ mdvsys build  
Executing(%prep): /bin/sh -e /home/erwan/rpm/tmp/rpm-tmp.18933
+ umask 022
+ cd /home/erwan/rpm/BUILD
+ '[' 1 -eq 1 ']'
+ '[' 1 -eq 1 ']'
+ '[' 1 -eq 1 ']'
+ cd /home/erwan/rpm/BUILD
+ rm -rf gcompris-8.2
+ /usr/bin/bzip2 -dc /home/erwan/gcompris/SOURCES/gcompris-8.2.tar.bz2
+ tar -xf -
tar: Archive is compressed. Use -z option
tar: Error is not recoverable: exiting now
error: Bad exit status from /home/erwan/rpm/tmp/rpm-tmp.18933 (%prep)


RPM build errors:
    Bad exit status from /home/erwan/rpm/tmp/rpm-tmp.18933 (%prep)
Use of uninitialized value in concatenation (.) or string at /usr/bin/mdvsys line 339.

Build failed