Problems while installing 3rd party software

[Simon Reber]

Dear all,

I have a problem during kickstart installation with some 3rd party
packages.
The packages are located within a mrepo repository.

The Kickstart looks as follow:
...
repo --name=<name> --baseurl=http://<IP>/<folder>/<folder>
...
%packages
...
### Adding QLogic Tools Set
scli
...

During installation no problems are reported nor shown.
But when the system is coming up after the installation is shows that
%post wasn't successfully executed of the given rpm (links are missing)
In the installation log, I found the following:

/var/tmp/rpm-tmp.18488: line 1: ln: command not found
/var/tmp/rpm-tmp.18488: line 2: ln: command not found
/var/tmp/rpm-tmp.18488: line 3: ln: command not found
/var/tmp/rpm-tmp.18488: line 4: ln: command not found
/var/tmp/rpm-tmp.18488: line 5: ln: command not found
/var/tmp/rpm-tmp.18488: line 6: ln: command not found
/var/tmp/rpm-tmp.18488: line 9: tar: command not found
/var/tmp/rpm-tmp.18488: line 10: tar: command not found
/var/tmp/rpm-tmp.18488: line 12: cp: command not found
/var/tmp/rpm-tmp.18488: line 14: cd: /tmp/lib: No such file or directory
/var/tmp/rpm-tmp.18488: line 15: ./libinstall: No such file or directory

Could it be that the guys who created the package forgot to add:
Requires: ln
Requires: tar
Requires: cp

Or is this something else?

Thanks and all the best,
Simon Reber