We define GO_HASH_FILE= to override buildroot go.hash file:

# the go version on the line below is for the ISO
GOLANG_OPTIONS = GOWORK=off GO_VERSION=1.23.4 GO_HASH_FILE=$(PWD)/deploy/iso/minikube-iso/go.hash
BUILDROOT_OPTIONS = BR2_EXTERNAL=../../deploy/iso/minikube-iso $(GOLANG_OPTIONS)

but there is no such variable in the buildroot go package,
So we just replace the existing one:

cp deploy/iso/minikube-iso/go.hash $(BUILD_DIR)/buildroot/package/go/go.hash

Probably should be upstreamed properly...

The real files for the "go" package are in https://github.com/buildroot/buildroot/tree/2025.02.x/package/go

We can upstream this change to the buildroot package so we don't need to replace the go.hash file.

Originally posted by @afbjorklund in #22101 (comment)