Issue compiling the repository after cloning

When I clone the repository and try to run the make command, I get an error related to the eigen files : "./PMNS_Sterile.h:23:10: fatal error: 'gsl/gsl_eigen.h' file not found". I managed to solve the issue on my branch (sterile_sensitivity) by updating OscProb to the latest version and modifying slightly some files with dependency issues. I don't know if it's a general issue but it might be worth investigating ?