no canonicalize_file_name on musl. funnily, the file using this says this is
not portable, but avoids the nonportability of realpath(path, NULL);
--- a/third_party/nasm/config/config-linux.h
+++ b/third_party/nasm/config/config-linux.h
@@ -139,7 +139,7 @@
 #define HAVE_ACCESS 1
 
 /* Define to 1 if you have the `canonicalize_file_name' function. */
-#define HAVE_CANONICALIZE_FILE_NAME 1
+/* #define HAVE_CANONICALIZE_FILE_NAME 1 */
 
 /* Define to 1 if you have the `cpu_to_le16' intrinsic function. */
 /* #undef HAVE_CPU_TO_LE16 */