I’ve tried to install
pip on Linux and it couldn’t find
freetype during the build process, even though it’s installed with dev packages.
freetype: no [The C/C++ header for freetype2 (ft2build.h) could not be found. You may need to install the development package.]
$ ls -l /usr/include/freetype2/ft2build.h -rw-r--r-- 1 root root 2383 Mar 13 17:29 /usr/include/freetype2/ft2build.h
$ freetype-config --cflags -I/usr/include/freetype2