Variables can be set on the command-line: https://www.gnu.org/software/make/manual/make.html#Overriding https://www.gnu.org/software/make/manual/make.html#Overr

Variables can be set on the command-line: https://www.gnu.org/software/make/manual/make.html#Overriding https://www.gnu.org/software/make/manual/make.html#Overridin... $ make HOST=dev1.example.org deploy Environment variables are also available in makefiles.