keleshev/Makefile

## dune
(executable
 (public_name my_program))

## dune-project
(lang dune 1.11)
(name my_program)

## Makefile
.PHONY: build install

ifeq ($(PREFIX),)
INSTALL_FLAGS=
else
INSTALL_FLAGS=--prefix=$(PREFIX)
endif

build:
	dune build

install: build
	dune install $(INSTALL_FLAGS)

## my_program.ml
let () = print_endline "hi"

## my_program.opam
# Intentionally empty
	.PHONY: build install

	ifeq ($(PREFIX),)
	INSTALL_FLAGS=
	else
	INSTALL_FLAGS=--prefix=$(PREFIX)
	endif

	build:
	dune build

	install: build
	dune install $(INSTALL_FLAGS)