Recent MakeMaker versions quote variables.
diff -ur razor-agents-2.85.orig/Makefile.PL razor-agents-2.85/Makefile.PL
--- razor-agents-2.85.orig/Makefile.PL	2007-05-09 00:47:53.000000000 +0200
+++ razor-agents-2.85/Makefile.PL	2015-08-19 06:35:39.000000000 +0200
@@ -142,7 +142,7 @@
   my $man5 = q{ \\
 		$(INST_MAN5DIR) $(INSTALLMAN5DIR)};
 
-  $inherited =~ s/(\$\((?:DEST)?INSTALL\w*MAN1DIR\))/$1$man5/gm;
+  $inherited =~ s/(\$\((?:DEST)?INSTALL\w*MAN1DIR\)"?)/$1$man5/gm;
 
   return $inherited;
 }