diff -Nru orig/readr/src/localtime.c patched/readr/src/localtime.c
--- orig/readr/src/localtime.c	2020-09-22 17:42:19.000000000 +0200
+++ patched/readr/src/localtime.c	2021-02-17 19:45:42.680643000 +0100
@@ -1189,9 +1189,11 @@
 
 }
 
+#if 0
 void tzset(void) {
   tzset_name(getenv("TZ"));
 }
+#endif
 
 /*
 ** The easy way to behave "as if no library function calls" localtime