https://bugzilla.redhat.com/show_bug.cgi?id=1181167
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=775139
https://bugs.gentoo.org/show_bug.cgi?id=536454

Index: kpathsea/mktexlsr
===================================================================
--- kpathsea.orig/mktexlsr
+++ kpathsea/mktexlsr
@@ -73,7 +73,7 @@ if tty -s; then verbose=true; else verbo
 dry_run=false
 trees=
 
-treefile="${TMPDIR-/tmp}/mktexlsrtrees$$.tmp"
+treefile=`mktemp --tmpdir mktexlsrtrees.XXXXXXXXXX` || exit 1
 trap 'cd /; rm -f $treefile; test -z "$db_dir_tmp" || rm -rf "$db_dir_tmp"; 
       exit' 0 1 2 3 7 13 15