Index: Makefile
--- Makefile.orig
+++ Makefile
@@ -2,9 +2,11 @@ SCANNER := wayland-scanner
 
 PREFIX=/usr/local
 BINDIR=$(PREFIX)/bin
-MANDIR=$(PREFIX)/share/man
+MANDIR=$(PREFIX)/man
 
-CFLAGS+=-Wall -Werror -Wextra -Wpedantic -Wno-unused-parameter -Wconversion -Wformat-security -Wformat -Wsign-conversion -Wfloat-conversion -Wunused-result
+CPPFLAGS=-I/usr/local/include
+CFLAGS+=-Wall -Werror -Wextra -Wpedantic -Wno-unused-parameter -Wconversion -Wformat-security -Wformat -Wsign-conversion -Wfloat-conversion -Wunused-result -Wno-strict-prototypes
+LDFLAGS=-L/usr/local/lib -Wl,-rpath /usr/local/lib
 LIBS=-lwayland-client
 OBJ=wlopm.o wlr-output-power-management-unstable-v1.o
 GEN=wlr-output-power-management-unstable-v1.c wlr-output-power-management-unstable-v1.h
@@ -21,8 +23,10 @@ $(OBJ): $(GEN)
 	$(SCANNER) client-header < $< > $@
 
 install: wlopm
-	install -D wlopm   $(DESTDIR)$(BINDIR)/wlopm
-	install -D wlopm.1 $(DESTDIR)$(MANDIR)/man1/wlopm.1
+	install -d $(DESTDIR)$(BINDIR)
+	install wlopm $(DESTDIR)$(BINDIR)
+	install -d $(DESTDIR)$(MANDIR)/man1
+	install -m 644 wlopm.1 $(DESTDIR)$(MANDIR)/man1
 
 uninstall:
 	$(RM) $(DESTDIR)$(BINDIR)/wlopm
@@ -32,4 +36,3 @@ clean:
 	$(RM) wlopm $(GEN) $(OBJ)
 
 .PHONY: clean install
-
