1 files changed, 7 insertions, 12 deletions
diff --git a/Master/tlpkg/TeXLive/TLWinGoo.pm b/Master/tlpkg/TeXLive/TLWinGoo.pm
index b1cfe76d1ea..0057bde14fb 100644
--- a/Master/tlpkg/TeXLive/TLWinGoo.pm
+++ b/Master/tlpkg/TeXLive/TLWinGoo.pm
@@ -286,19 +286,14 @@ values as environment variable and returns the result.
 
 =cut
 
-sub expand_env {
-  my $key = shift;
-  foreach my $k (keys %ENV) {
-     return $ENV{$k} if (uc($k) eq uc($key));
-  }
-
-  return "%$key%";
-}
-
 sub expand_string {
-  $s = shift @_;
-  $s =~ s/%([^%;]+)%/expand_env($1)/eg;
+  my ($s) = @_;
+  $s =~ s/%([^%;]+)%/expand_var($1)/eg;
   return $s;
+  sub expand_var {
+    my ($key) = @_;
+    return ($ENV{$key} ? $ENV{$key} : "%$key%");
+  }
 }
 
 =pod
@@ -324,7 +319,7 @@ sub is_a_texdir {
   $d =~ s/\\/\//g;
   $d = $d . '/' unless $d =~ m!/$!;
   # don't consider anything under %systemroot% a texdir
-  my $sr = uc(expand_string($ENV{'SystemRoot'}));
+  my $sr = uc($ENV{'SystemRoot'});
   $sr =~ s/\\/\//g;
   $sr = $sr . '/' unless $sr =~ m!/$!;
   return 0 if index($d, $sr)==0;