diff --git a/2022/05-gencant/Rakefile b/2022/05-gencant/Rakefile
index d6eafb8..878e82f 100644
--- a/2022/05-gencant/Rakefile
+++ b/2022/05-gencant/Rakefile
@@ -1,27 +1,5 @@
 require 'squib'
 
-module OS
-  def OS.windows?
-    (/cygwin|mswin|mingw|bccwin|wince|emx/ =~ RUBY_PLATFORM) != nil
-  end
-
-  def OS.mac?
-   (/darwin/ =~ RUBY_PLATFORM) != nil
-  end
-
-  def OS.unix?
-    !OS.windows?
-  end
-
-  def OS.linux?
-    OS.unix? and not OS.mac?
-  end
-
-  def OS.jruby?
-    RUBY_ENGINE == 'jruby'
-  end
-end
-
 task default: [:deck, :rules]
 
 task :deck do
@@ -33,6 +11,5 @@ task rules: "_output/RULES.pdf"
 
 file "_output/RULES.pdf" => ["Rules.md", "_output"] do |t|
   respaths = [".", "docs/"]
-  if OS.windows? then sep = ";" else sep = ":" end
-  sh "pandoc", "-o", t.name, t.source, "--resource-path=#{respaths.join(sep)}"
+  sh "pandoc", "-o", t.name, t.source, "--resource-path=#{respaths.join(File::PATH_SEPARATOR)}"
 end
\ No newline at end of file