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diff --git a/Master/tlpkg/tlperl/lib/File/Spec/Cygwin.pm b/Master/tlpkg/tlperl/lib/File/Spec/Cygwin.pm
new file mode 100644
index 00000000000..050a1bb2b77
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+++ b/Master/tlpkg/tlperl/lib/File/Spec/Cygwin.pm
@@ -0,0 +1,155 @@
+package File::Spec::Cygwin;
+
+use strict;
+use vars qw(@ISA $VERSION);
+require File::Spec::Unix;
+
+$VERSION = '3.30';
+$VERSION = eval $VERSION;
+
+@ISA = qw(File::Spec::Unix);
+
+=head1 NAME
+
+File::Spec::Cygwin - methods for Cygwin file specs
+
+=head1 SYNOPSIS
+
+ require File::Spec::Cygwin; # Done internally by File::Spec if needed
+
+=head1 DESCRIPTION
+
+See L<File::Spec> and L<File::Spec::Unix>.  This package overrides the
+implementation of these methods, not the semantics.
+
+This module is still in beta.  Cygwin-knowledgeable folks are invited
+to offer patches and suggestions.
+
+=cut
+
+=pod
+
+=over 4
+
+=item canonpath
+
+Any C<\> (backslashes) are converted to C</> (forward slashes),
+and then File::Spec::Unix canonpath() is called on the result.
+
+=cut
+
+sub canonpath {
+    my($self,$path) = @_;
+    return unless defined $path;
+
+    $path =~ s|\\|/|g;
+
+    # Handle network path names beginning with double slash
+    my $node = '';
+    if ( $path =~ s@^(//[^/]+)(?:/|\z)@/@s ) {
+        $node = $1;
+    }
+    return $node . $self->SUPER::canonpath($path);
+}
+
+sub catdir {
+    my $self = shift;
+    return unless @_;
+
+    # Don't create something that looks like a //network/path
+    if ($_[0] and ($_[0] eq '/' or $_[0] eq '\\')) {
+        shift;
+        return $self->SUPER::catdir('', @_);
+    }
+
+    $self->SUPER::catdir(@_);
+}
+
+=pod
+
+=item file_name_is_absolute
+
+True is returned if the file name begins with C<drive_letter:>,
+and if not, File::Spec::Unix file_name_is_absolute() is called.
+
+=cut
+
+
+sub file_name_is_absolute {
+    my ($self,$file) = @_;
+    return 1 if $file =~ m{^([a-z]:)?[\\/]}is; # C:/test
+    return $self->SUPER::file_name_is_absolute($file);
+}
+
+=item tmpdir (override)
+
+Returns a string representation of the first existing directory
+from the following list:
+
+    $ENV{TMPDIR}
+    /tmp
+    $ENV{'TMP'}
+    $ENV{'TEMP'}
+    C:/temp
+
+Since Perl 5.8.0, if running under taint mode, and if the environment
+variables are tainted, they are not used.
+
+=cut
+
+my $tmpdir;
+sub tmpdir {
+    return $tmpdir if defined $tmpdir;
+    $tmpdir = $_[0]->_tmpdir( $ENV{TMPDIR}, "/tmp", $ENV{'TMP'}, $ENV{'TEMP'}, 'C:/temp' );
+}
+
+=item case_tolerant
+
+Override Unix. Cygwin case-tolerance depends on managed mount settings and
+as with MsWin32 on GetVolumeInformation() $ouFsFlags == FS_CASE_SENSITIVE,
+indicating the case significance when comparing file specifications.
+Default: 1
+
+=cut
+
+sub case_tolerant {
+  return 1 unless $^O eq 'cygwin'
+    and defined &Cygwin::mount_flags;
+
+  my $drive = shift;
+  if (! $drive) {
+      my @flags = split(/,/, Cygwin::mount_flags('/cygwin'));
+      my $prefix = pop(@flags);
+      if (! $prefix || $prefix eq 'cygdrive') {
+          $drive = '/cygdrive/c';
+      } elsif ($prefix eq '/') {
+          $drive = '/c';
+      } else {
+          $drive = "$prefix/c";
+      }
+  }
+  my $mntopts = Cygwin::mount_flags($drive);
+  if ($mntopts and ($mntopts =~ /,managed/)) {
+    return 0;
+  }
+  eval { require Win32API::File; } or return 1;
+  my $osFsType = "\0"x256;
+  my $osVolName = "\0"x256;
+  my $ouFsFlags = 0;
+  Win32API::File::GetVolumeInformation($drive, $osVolName, 256, [], [], $ouFsFlags, $osFsType, 256 );
+  if ($ouFsFlags & Win32API::File::FS_CASE_SENSITIVE()) { return 0; }
+  else { return 1; }
+}
+
+=back
+
+=head1 COPYRIGHT
+
+Copyright (c) 2004,2007 by the Perl 5 Porters.  All rights reserved.
+
+This program is free software; you can redistribute it and/or modify
+it under the same terms as Perl itself.
+
+=cut
+
+1;