Actually I had almost the same question, but i was trying to install
"math".
After installing activetcl8.5 in /usr/bin, i ran "teacup install math".
However, I found my eclipse still can't resolve this line "package require
math"--there is a red check ahead of it.
Here is the result I get from your suggested tool, and "math" is right
there, please let me what should I do. Thanks a lot!