python3-numpy not in jethro sources

Is pulling bb recipies from the Master Branch allowed when my BSP is jethro? I’ve been successful bringing in things like python3 and python3-pyserial into the bake but I’m having zero luck with python3-numpy and I see it’s from Openembedded Core Layer from the Master Branch - and there isn’t one for jethro. I’ve been trying now for hours to bring numpy into the mix and it just refuses to merge so about all that’s left for me to think of is that there is a problem pulling from Master when I should be staying in jethro.