For the checkinstall part, the original website http://www.asic-linux.com.mx/~izto/checkinstall/
"An incompatibility with the newest coreutils seems to have bitten a bunch of people, specially users of the recently released Slackware 12. A new checkinstall version will be released soon which will address this issue. In the meantime, as a workaround you can use the "--fstrans=no" command line flag when invoking checkinstall."
After many tests, i consider checkinstall works fine.