[Lazarus] Can not install a package

[Haruyuki Fujimaki]

Hello, 

I am trying to install a package to 1.0.10 on Linux Mint 15, but have been unable to install it receiving an error massage:
"Fatal: Can not find unit <package_name> used by Lazarus. Check if package <package_name> is in the dependencies."


The package file is the same one successfully installed on 1.0.6 on Xubuntu 13.04. So the problem seems strange for me.
How can I inform Lazarus path of the package? 

Fujimaki