diff -Naur a/cpan/ExtUtils-MakeMaker/lib/ExtUtils/MakeMaker.pm b/cpan/ExtUtils-MakeMaker/lib/ExtUtils/MakeMaker.pm
--- a/cpan/ExtUtils-MakeMaker/lib/ExtUtils/MakeMaker.pm	2017-06-30 17:03:20.000000000 -0400
+++ b/cpan/ExtUtils-MakeMaker/lib/ExtUtils/MakeMaker.pm	2018-02-28 10:06:37.031237946 -0500
@@ -1267,7 +1267,12 @@
     my $value = shift;
     return $value if $UNDER_CORE;
     my $tvalue = '';
-    require B;
+    eval {
+        require B;
+    };
+    if ($@) {
+        return $tvalue;
+    }
     my $sv = B::svref_2object(\$value);
     my $magic = ref($sv) eq 'B::PVMG' ? $sv->MAGIC : undef;
     while ( $magic ) {