diff -wur zsh-5.0.2.orig/Src/mkmakemod.sh zsh-5.0.2/Src/mkmakemod.sh
--- zsh-5.0.2.orig/Src/mkmakemod.sh	2011-05-13 11:07:35.000000000 -0700
+++ zsh-5.0.2/Src/mkmakemod.sh	2013-09-14 17:30:18.000000000 -0700
@@ -94,7 +94,8 @@
 
     trap "rm -f $the_subdir/${the_makefile}.in; exit 1" 1 2 15
     echo "creating $the_subdir/${the_makefile}.in"
-    exec 3>&1 >$the_subdir/${the_makefile}.in
+    # Workaround for 475284
+    exec {GEN_FILE}>&1 >$the_subdir/${the_makefile}.in
     echo "##### ${the_makefile}.in generated automatically by mkmakemod.sh"
     echo "##### DO NOT EDIT!"
     echo
@@ -457,7 +458,7 @@
 
     echo "##### End of ${the_makefile}.in"
 
-    exec >&3 3>&-
+    exec >&{GEN_FILE} {GEN_FILE}>&-
 
 fi