diff -aruN a/zlib-1.2.6/Makefile.in b/zlib-1.2.6/Makefile.in
--- a/zlib-1.2.6/Makefile.in	2014-06-10 12:01:33.545047312 -0700
+++ b/zlib-1.2.6/Makefile.in	2014-06-10 14:33:50.674540434 -0700
@@ -17,7 +17,6 @@
 #    make install prefix=$HOME
 
 CC=cc
-
 CFLAGS=-O
 #CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
 #CFLAGS=-g -DDEBUG
@@ -44,6 +43,7 @@
 TAR=tar
 SHELL=/bin/sh
 EXE=
+INSTALL=/usr/bin/install -c -C
 
 builddir = .
 srcdir = .
@@ -187,35 +187,28 @@
 	$(CC) $(CFLAGS) -o $@ minigzip64.o $(TEST_LDFLAGS)
 
 install-libs: $(LIBS)
-	-@if [ ! -d $(DESTDIR)$(exec_prefix)  ]; then mkdir -p $(DESTDIR)$(exec_prefix); fi
-	-@if [ ! -d $(DESTDIR)$(libdir)       ]; then mkdir -p $(DESTDIR)$(libdir); fi
-	-@if [ ! -d $(DESTDIR)$(sharedlibdir) ]; then mkdir -p $(DESTDIR)$(sharedlibdir); fi
-	-@if [ ! -d $(DESTDIR)$(man3dir)      ]; then mkdir -p $(DESTDIR)$(man3dir); fi
-	-@if [ ! -d $(DESTDIR)$(pkgconfigdir) ]; then mkdir -p $(DESTDIR)$(pkgconfigdir); fi
-	cp $(STATICLIB) $(DESTDIR)$(libdir)
-	chmod 644 $(DESTDIR)$(libdir)/$(STATICLIB)
+	@$(INSTALL) -d $(DESTDIR)$(exec_prefix)
+	@$(INSTALL) -d $(DESTDIR)$(libdir)
+	@$(INSTALL) -d $(DESTDIR)$(sharedlibdir)
+	@$(INSTALL) -d $(DESTDIR)$(man3dir)
+	@$(INSTALL) -d $(DESTDIR)$(pkgconfigdir)
+	@$(INSTALL) -m 644 $(STATICLIB) $(DESTDIR)$(libdir)
 	-@($(RANLIB) $(DESTDIR)$(libdir)/libz.a || true) >/dev/null 2>&1
 	-@if test -n "$(SHAREDLIBV)"; then \
-	  cp $(SHAREDLIBV) $(DESTDIR)$(sharedlibdir); \
-	  echo "cp $(SHAREDLIBV) $(DESTDIR)$(sharedlibdir)"; \
-	  chmod 755 $(DESTDIR)$(sharedlibdir)/$(SHAREDLIBV); \
-	  echo "chmod 755 $(DESTDIR)$(sharedlibdir)/$(SHAREDLIBV)"; \
-	  rm -f $(DESTDIR)$(sharedlibdir)/$(SHAREDLIB) $(DESTDIR)$(sharedlibdir)/$(SHAREDLIBM); \
-	  ln -s $(SHAREDLIBV) $(DESTDIR)$(sharedlibdir)/$(SHAREDLIB); \
-	  ln -s $(SHAREDLIBV) $(DESTDIR)$(sharedlibdir)/$(SHAREDLIBM); \
+	  $(INSTALL) -m 755 $(SHAREDLIBV) $(DESTDIR)$(sharedlibdir); \
+	  echo "$(INSTALL) -m 755 $(SHAREDLIBV) $(DESTDIR)$(sharedlibdir)"; \
+	  ln -sf $(SHAREDLIBV) $(DESTDIR)$(sharedlibdir)/$(SHAREDLIB); \
+	  ln -sf $(SHAREDLIBV) $(DESTDIR)$(sharedlibdir)/$(SHAREDLIBM); \
 	  ($(LDCONFIG) || true)  >/dev/null 2>&1; \
 	fi
-	cp $(srcdir)/zlib.3 $(DESTDIR)$(man3dir)
-	chmod 644 $(DESTDIR)$(man3dir)/zlib.3
-	cp zlib.pc $(DESTDIR)$(pkgconfigdir)
-	chmod 644 $(DESTDIR)$(pkgconfigdir)/zlib.pc
+	@$(INSTALL) -m 644 $(srcdir)/zlib.3 $(DESTDIR)$(man3dir)
+	@$(INSTALL) -m 644 zlib.pc $(DESTDIR)$(pkgconfigdir)
 # The ranlib in install is needed on NeXTSTEP which checks file times
 # ldconfig is for Linux
 
 install: install-libs
-	-@if [ ! -d $(DESTDIR)$(includedir)   ]; then mkdir -p $(DESTDIR)$(includedir); fi
-	cp $(srcdir)/zlib.h zconf.h $(DESTDIR)$(includedir)
-	chmod 644 $(DESTDIR)$(includedir)/zlib.h $(DESTDIR)$(includedir)/zconf.h
+	$(INSTALL) -d $(DESTDIR)$(includedir)
+	$(INSTALL) -m 644 $(srcdir)/zlib.h zconf.h $(DESTDIR)$(includedir)
 
 uninstall:
 	cd $(DESTDIR)$(includedir); rm -f zlib.h zconf.h