If you have TCL version issue and need to upgrade, first check your version:
list tcl tcl-devel
If you have outdated version, follow these steps
wget https://prdownloads.sourceforge.net/tcl/tcl8.6.10-src.tar.gz
tar zxf tcl8.6.10-src.tar.gz
cd tcl8.6.10/unix
./configure
make
make test
make install
After you are done, if it is EggDrop related issue, make sure to compile your bot again.