https://bugs.gentoo.org/668250
--- a/homepage/ref/pphtp.pl
+++ b/homepage/ref/pphtp.pl
@@ -6,7 +6,7 @@
 #  -n include line numbers
 #  -s include EBNF like syntax
 
-require "hlhtp.pl";
+require "./hlhtp.pl";
 
 
 while ($ARGV[0] =~ /^-(.*)/) {