diff -Nru orig/readr/src/localtime.c patched/readr/src/localtime.c
--- orig/readr/src/localtime.c	2018-12-20 17:06:40.000000000 +0100
+++ patched/readr/src/localtime.c	2020-07-02 18:06:22.157803000 +0200
@@ -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