File fix_compression_constant.patch of Package nonpareil
--- src/printer.c.orig 2015-02-25 14:59:31.704375067 -0300 +++ src/printer.c 2015-02-25 14:59:52.668375147 -0300 @@ -594,7 +594,7 @@ } png_init_io (png_ptr, f); - png_set_compression_level (png_ptr, Z_BEST_COMPRESSION); + png_set_compression_level (png_ptr, 9); png_set_IHDR (png_ptr, info_ptr,