make git barf when an alias changes environment variables

diff --git a/perl/Makefile.PL b/perl/Makefile.PL
index 9b117fd0d736615a8c4aeda742384956373d295a..437516142cb6c14f197dc5821635a6ff8bc91adf 100644 (file)
--- a/perl/Makefile.PL
+++ b/perl/Makefile.PL
@@ -13,7 +13,7 @@ my %pm = ('Git.pm' => '$(INST_LIBDIR)/Git.pm');
 # We come with our own bundled Error.pm. It's not in the set of default
 # Perl modules so install it if it's not available on the system yet.
 eval { require Error };
-if ($@) {
+if ($@ || $Error::VERSION < 0.15009) {
        $pm{'private-Error.pm'} = '$(INST_LIBDIR)/Error.pm';
 }