Is there a way to tell bitbake that some DEPENDS is already available

I am trying to cross-compile using bitbake, and some of the DEPENDS are already available in sysroot.Which i have provided in one of the .inc files

TARGET_SYSROOT = "/path/to/my/sysroot" #has usr/include, usr/lib64 and usr/lib64/pkgconfigTOOLCHAIN_OPTIONS = " --sysroot=/path/to/my/sysroot "

But i still see that bitbake downloads and tries to compile the dependencies.Is there a way to tell bitbake that the dependencies are already available.

Compiler is gcc-7 and OS is ubuntu 16.04