NONGUIX_DIR ?= ~/Code/nonguix
GUIX_SUBSTITUTE_FLAG = --substitute-urls='https://ci.guix.gnu.org https://substitutes.nonguix.org'
GUIX_LIB_FLAGS = -L ./ -L $(NONGUIX_DIR)
GUIX_IMAGE_CMD ?= guix system image $(GUIX_SUBSTITUTE_FLAG) --image-type=qcow2 $(GUIX_LIB_FLAGS)
LIBVIRT_GROUP ?= libvirt

machines/%.qcow2: machines/%.scm
	$(eval RO := $(shell $(GUIX_IMAGE_CMD) $<))
	install -C -m 666 -o $(USER) -g $(LIBVIRT_GROUP) $(RO) $@

VM_RAM ?= 4000
VM_CPU ?= 4

.PHONY: machines/%
machines/%: machines/%.qcow2
	$(eval OVMF := $(shell guix build $(GUIX_SUBSTITUTE_FLAG) ovmf))
	qemu-system-x86_64 -nic bridge,br=virbr0 -enable-kvm -hda $< -m $(VM_RAM) -smp $(VM_CPU) -bios $(OVMF)/share/firmware/ovmf_x64.bin