diff -ur glew.org/Makefile glew/Makefile
--- glew.org/Makefile	2016-05-02 06:25:53.521291677 +0200
+++ glew/Makefile	2016-05-02 06:31:10.325035494 +0200
@@ -55,7 +55,8 @@
 DIST_SRC_TGZ ?= $(shell pwd)/$(DIST_NAME).tgz
 DIST_WIN32   ?= $(shell pwd)/$(DIST_NAME)-win32.zip
 
-DIST_DIR := $(shell mktemp -d /tmp/glew.XXXXXX)/$(DIST_NAME)
+TMPDIR ?= /tmp
+DIST_DIR := $(shell mktemp -d $(TMPDIR)/glew.XXXXXX)/$(DIST_NAME)
 
 # To disable stripping of binaries either:
 #   - use STRIP= on gmake command-line