diff -u -r ../postgresql-10.0/src/backend/commands/collationcmds.c ./src/backend/commands/collationcmds.c
--- ../postgresql-10.0/src/backend/commands/collationcmds.c	2017-10-02 23:09:15.000000000 +0200
+++ ./src/backend/commands/collationcmds.c	2017-10-06 22:00:29.165645642 +0200
@@ -362,7 +362,7 @@
 
 
 /* will we use "locale -a" in pg_import_system_collations? */
-#if defined(HAVE_LOCALE_T) && !defined(WIN32)
+#if defined(HAVE_LOCALE_T) && !defined(WIN32) && !defined(__ANDROID__)
 #define READ_LOCALE_A_OUTPUT
 #endif