diff -r 4baf79a77afa -r 8e516f71577a Makefile
--- a/Makefile	Fri Mar 24 08:37:26 2017 -0700
+++ b/Makefile	Mon Mar 20 17:50:05 2017 -0400
@@ -165,14 +165,14 @@
 	make -C doc all install DESTDIR="$(PWD)/build/mercurial/"
         # install zsh completions - this location appears to be
         # searched by default as of macOS Sierra.
-	mkdir -p build/mercurial/usr/local/share/zsh/site-functions
-	cp contrib/zsh_completion build/mercurial/usr/local/share/zsh/site-functions/hg
+	install -d build/mercurial/usr/local/share/zsh/site-functions/
+	install -m 0644 contrib/zsh_completion build/mercurial/usr/local/share/zsh/site-functions/hg
         # install bash completions - there doesn't appear to be a
         # place that's searched by default for bash, so we'll follow
         # the lead of Apple's git install and just put it in a
         # location of our own.
-	mkdir -p build/mercurial/usr/local/hg/contrib
-	cp contrib/bash_completion build/mercurial/usr/local/hg/contrib/hg-completion.bash
+	install -d build/mercurial/usr/local/hg/contrib/
+	install -m 0644 contrib/bash_completion build/mercurial/usr/local/hg/contrib/hg-completion.bash
 	mkdir -p $${OUTPUTDIR:-dist}
 	HGVER=$$((cat build/mercurial/Library/Python/2.7/site-packages/mercurial/__version__.py; echo 'print(version)') | python) && \
 	OSXVER=$$(sw_vers -productVersion | cut -d. -f1,2) && \