diff -uNr boinc-client_release-7.18-7.18.1/lib/gui_rpc_client.cpp boinc-client_release-7.18-7.18.1.mod/lib/gui_rpc_client.cpp
--- boinc-client_release-7.18-7.18.1/lib/gui_rpc_client.cpp	2021-08-03 23:52:19.000000000 +0800
+++ boinc-client_release-7.18-7.18.1.mod/lib/gui_rpc_client.cpp	2021-12-29 19:11:49.145461911 +0800
@@ -416,7 +416,7 @@
     char msg_buf[1024];
     FILE* f = fopen(GUI_RPC_PASSWD_FILE, "r");
     if (!f) {
-#if defined(__linux__)
+#if defined(__linux__) && !defined(__ANDROID__)
 #define HELP_URL "https://boinc.berkeley.edu/gui_rpc.php"
         char path[MAXPATHLEN];
         if (errno == EACCES) {