diff --git a/src/backend/bs_mkarchrepo b/src/backend/bs_mkarchrepo
index 04265f30d92..46d0bb0c2f7 100755
--- a/src/backend/bs_mkarchrepo
+++ b/src/backend/bs_mkarchrepo
@@ -2,8 +2,9 @@
 
 BEGIN {
   my ($wd) = $0 =~ m-(.*)/- ;
+  $wd ||= '.';
   unshift @INC,  "$wd/build";
-  unshift @INC,  $wd; 
+  unshift @INC,  "$wd";
 }
 
 use strict;