More mock problems

[Neal Becker]

  mock -r fedora-devel-x86_64 --shell
INFO: mock.py version 0.9.14 starting...
State Changed: init plugins
State Changed: start
State Changed: lock buildroot
mock-chroot> rpm -q igraph
rpmdb: Program version 4.7 doesn't match environment version 4.5
error: db4 error(-30971) from dbenv->open: DB_VERSION_MISMATCH: Database 
environment version mismatch
error: cannot open Packages index using db3 -  (-30971)
error: cannot open Packages database in /var/lib/rpm
rpmdb: Program version 4.7 doesn't match environment version 4.5
error: db4 error(-30971) from dbenv->open: DB_VERSION_MISMATCH: Database 
environment version mismatch
error: cannot open Packages database in /var/lib/rpm
package igraph is not installed