-AR := $(if $(wildcard ../bin/ar65*),../bin/ar65,ar65)
-CA := $(if $(wildcard ../bin/ca65*),../bin/ca65,ca65)
-CC := $(if $(wildcard ../bin/cc65*),../bin/cc65,cc65)
-CO := $(if $(wildcard ../bin/co65*),../bin/co65,co65)
-LD := $(if $(wildcard ../bin/ld65*),../bin/ld65,ld65)
+AR65 := $(if $(wildcard ../bin/ar65*),../bin/ar65,ar65)
+CA65 := $(if $(wildcard ../bin/ca65*),../bin/ca65,ca65)
+CC65 := $(if $(wildcard ../bin/cc65*),../bin/cc65,cc65)
+CO65 := $(if $(wildcard ../bin/co65*),../bin/co65,co65)
+LD65 := $(if $(wildcard ../bin/ld65*),../bin/ld65,ld65)
+
+export CC65_HOME := $(abspath ..)