Ccache 0 hits and all misses

I am using ccache to speed up my build process and ensure to add ccache to PATH.
However, when I print the ccache summary while building pytorch, it shows 0 hits and all misses:

Is my ccache being used at all. How do I check this?

Additionally, I can see that ccache is set in my CMakeCache.txt file as well:

Running DEBUG=1 USE_DISTRIBUTED=0 USE_MKLDNN=0 USE_CUDA=0 BUILD_TEST=0 USE_FBGEMM=0 USE_NNPACK=0 USE_QNNPACK=0 USE_XNNPACK=0 python develop is taking me more than 12 to 14 hours.

Any help appreciated!