File fix_requires.patch of Package cpanspec

diff --git a/cpanspec b/cpanspec
index 58fdce5..3611f87 100755
--- a/cpanspec
+++ b/cpanspec
@@ -1232,6 +1232,7 @@ END
 
     printf $spec "%-16s%s\n", "BuildRequires:", "perl";
     printf $spec "%-16s%s\n", "BuildRequires:", "perl-macros";
+    printf $spec "%-16s%s\n", "BuildRequires:", "(rpm-build-perl or perl-generators)";
 
     for my $dep (keys(%requires)) {
         next if ($dep eq 'perl');