diff -r -u /tmp/libpng-1.6.34/scripts/pnglibconf.h.prebuilt ./scripts/pnglibconf.h.prebuilt
--- /tmp/libpng-1.6.34/scripts/pnglibconf.h.prebuilt	2017-09-29 01:42:33.000000000 -0700
+++ ./scripts/pnglibconf.h.prebuilt	2018-05-01 09:51:24.719318242 -0700
@@ -20,6 +20,12 @@
 #define PNG_ALIGNED_MEMORY_SUPPORTED
 /*#undef PNG_ARM_NEON_API_SUPPORTED*/
 /*#undef PNG_ARM_NEON_CHECK_SUPPORTED*/
+
+/* Workaround not having a great build file by forcing
+ * png filter optimization to be disabled on arm */
+#define PNG_ARM_NEON_OPT 0
+
+
 /*#undef PNG_POWERPC_VSX_API_SUPPORTED*/
 /*#undef PNG_POWERPC_VSX_CHECK_SUPPORTED*/
 #define PNG_BENIGN_ERRORS_SUPPORTED