After installing PSL1GHT need to install the Cg Toolkit?

[ErikPshat]

After installing PSL1GHT, you probably need to install the Cg Toolkit?
At the end of compilation, the following is written in the console:

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You should download and install the Cg Toolkit with the following command from the Ubuntu repository:

sudo apt install nvidia-cg-toolkit

or

sudo apt-get install nvidia-cg-toolkit