Kitty: Package gl was not found in the pkg-config search path.

[kenardes]

when i run 'make' command to install kitty, it produce error:
python3 setup.py
CC: gcc (6, 3)
Package gl was not found in the pkg-config search path.
Perhaps you should add the directory containing `gl.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gl' found
The package gl was not found on your system
Makefile:9: recipe for target 'all' failed
make: * [all] Error 1

my machine run debian 9.3 64bit

[kenardes]

the problem is fixed after install libgl1-mesa-dev