Hi, so I'm not sure where it's supposed to be but those are some common locations. It's good that you found the libblas files, so definitely include the enclosing folder in your -L linker flags (in the options.mk file). But as you can see from the error message, the library that's missing is liblapack. So all I can tell you is please look in the standard install locations for the file liblapack.so If it's not in a standard location then it either means the associated package was not installed (or was somehow damaged) or is not a standard installation in some sense.