failed: No module named 'catkin_pkg' Make sure that you have installed "catkin_pkg"
https://stackoverflow.com/questions/43024337/why-this-error-when-i-try-to-create-workspaces-in-ros#
Are you using Anaconda environment? This issue is quite common with Anaconda's Python installation.
Try: python --version
If you see Anaconda in the output, go to your bashrc file with vi ~/.bashrc and then comment the line where anaconda is added to path. It would be something like,
export PATH="username/anaconda2/bin:$PATH"
After that source your bashrc with source ~/.bashrc, open a new terminal and navigate to your catkin workspace. Delete the old build folder and try the catkin_make command again.
Should solve your issue.
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