diff -u -r ../ne-3.1.0/makefile ./makefile
--- ../ne-3.1.0/makefile	2017-04-29 12:22:39.000000000 +0200
+++ ./makefile	2017-05-04 23:14:54.916199058 +0200
@@ -8,7 +8,7 @@
 # and installed under the $(PREFIX) hierarchy. You can even use "make install PREFIX=$HOME/<dir>"
 # to install ne locally into the directory <dir>.
 
-PREFIX=/usr/local
+PREFIX?=/usr/local
 
 PROGRAM       = ne
 
@@ -20,7 +20,7 @@
 
 
 build: docs
-	( cd src; make clean; make NE_GLOBAL_DIR=$(PREFIX)/share/ne; strip ne )
+	( cd src; make clean; make NE_GLOBAL_DIR=$(PREFIX)/share/ne; $(STRIP) ne )
 
 docs:
 	( cd doc; make )
@@ -82,7 +82,7 @@
 ifneq ($(OS), Darwin)
 	$(error This target can only be run under Mac OS X)
 endif
-	( cd src; make clean; make NE_GLOBAL_DIR=/usr/share/ne; strip ne )
+	( cd src; make clean; make NE_GLOBAL_DIR=/usr/share/ne; $(STRIP) ne )
 	-rm -fr /tmp/package-ne-$(VERSION)
 	make install DESTDIR=/tmp/package-ne-$(VERSION)
 	pkgbuild --root /tmp/package-ne-$(VERSION) --install-location "/" --version $(VERSION) --identifier ne-$(VERSION) ne-$(VERSION).pkg