lib/revealing/tasks/gpp.rake in revealing-1.0.2 vs lib/revealing/tasks/gpp.rake in revealing-1.0.3

@@ -1,4 +1,6 @@
+prereq 'gpp'
+
 desc "Sources are pre-processed into the single #{GPP_FILE}"
-file GPP_FILE => [GPP_DIR, DIRTY_FILE] + SOURCE_FILES do |target|
+file GPP_FILE => ['gpp', GPP_DIR, DIRTY_FILE] + SOURCE_FILES do |target|
   sh %(gpp -I src -x -o #{target} #{SOURCE_DIR}/index.markdown)
 end