cpyrit_opencl

[L30n666]

i run the command for install module opencl:
python setup.py build
i try too with:
python2 setup.py build
but it returns the same:

The headers required to build the OpenCL-kernel were not found. Trying to continue anyway...
running build
running build_ext
Building modules...
building 'cpyrit._cpyrit_opencl' extension
x86_64-linux-gnu-gcc -pthread -fno-strict-aliasing -Wdate-time -D_FORTIFY_SOURCE=2 -g -ffile-prefix-map=/build/python2.7-vgIf7a/python2.7-2.7.18=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/usr/include/python2.7 -c _cpyrit_opencl.c -o build/temp.linux-x86_64-2.7/_cpyrit_opencl.o -Wall -fno-strict-aliasing -DVERSION="0.5.0"
_cpyrit_opencl.c:45:14: fatal error: CL/cl.h: No existe el fichero o el directorio
45 | #include <CL/cl.h>
| ^~~~~~~~~
compilation terminated.
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

Help me please!