diff --git a/lib/Makefile.ctan b/lib/Makefile.ctan
index 84d6c51..1c44b21 100644
--- a/lib/Makefile.ctan
+++ b/lib/Makefile.ctan
@@ -1,10 +1,11 @@
 # make a zip for CTAN submission including the TeX directory structure
+TMP    	        = /tmp
 TDSCOLL 	= proposal
-EXPORTED	= /tmp/$(TDSCOLL)
-TDSDIR 		= /tmp/$(TDSCOLL).tds
-TDSZIP 		= /tmp/$(TDSCOLL).tds.zip
-CTANDIR 	= /tmp/$(TDSCOLL).ctan
-CTANZIP 	= /tmp/$(TDSCOLL).ctan.zip
+EXPORTED	= $(TMP)/$(TDSCOLL)
+TDSDIR 		= $(TMP)/$(TDSCOLL).tds
+TDSZIP 		= $(TMP)/$(TDSCOLL).tds.zip
+CTANDIR 	= $(TMP)/$(TDSCOLL).ctan
+CTANZIP 	= $(TMP)/$(TDSCOLL).ctan.zip
 
 # this target makes the file CTANZIP by creating and populating the directory 
 # CTANDIR and zipping it. To be current, we first make all, and update 
@@ -21,7 +22,7 @@ ctan: all filedate checksum
 	rm $(EXPORTED)/.gitignore
 	cd $(EXPORTED); $(MAKE) -$(MAKEFLAGS) ctanext
 	@echo "zipping the result to $(TDSCOLL).ctan.zip"
-	cd $(CTANDIR); zip -r -q $(CTANZIP) .; cd -; cp $(CTANZIP) .
+	cd $(TMP); zip -r -q $(CTANZIP) .; cd -; cp $(CTANZIP) .
 	rm -Rf $(EXPORTED) $(CTANDIR) $(CTANZIP)
 
 # this target is run on EXPORTED. It first makes the target tdsext below, 
@@ -61,7 +62,7 @@ ltds:
 	cp $(TDS.doc) $(TDSDIR)/doc/latex/$(TDSCOLL)
 
 # copy stuff around for a CTAN submission in the DTX dirs
-CTANDIR = /tmp/$(TDSCOLL).ctan
+CTANDIR = $(TMP)/$(TDSCOLL).ctan
 lctan: 
 	mkdir -p $(CTANDIR)/sty;
 	@for d in $(DISTDIRS); do (cp -R $$d $(CTANDIR)/sty) done