coreboot

I worked on the amdfwread tool and I noticed that it is used by AMD common Makefiles for VBOOT:
https://github.com/coreboot/coreboot/blob/ee347d88120bca22d64a1581cd91eee786e2d7db/src/soc/amd/common/Makefile.mk#L65
It apparently creates a file called "ro-amdfw-list" which contains address ranges for the regions that are needed by VBOOT toolings so that it knows which regions to protect with a signature?
The problem is that I noticed that the file is read before it even exists:
https://github.com/coreboot/coreboot/blob/ee347d88120bca22d64a1581cd91eee786e2d7db/src/soc/amd/phoenix/Makefile.mk#L375
The file is created during "build_complete", but it is queried at the beginning of the build process, which causes the "vboot-gscvd-ranges" variable to contain "error" entries instead of actual regions. Looking at the code, it seems this has never worked from the beginning. Since this potentially security relevant (although I don't know to which degree since I am unfamiliar with the GSCVD implementation), it should be addressed.