diff -uNr calcurse-4.6.0/src/utils.c calcurse-4.6.0.mod/src/utils.c
--- calcurse-4.6.0/src/utils.c	2020-02-04 23:46:34.000000000 +0200
+++ calcurse-4.6.0.mod/src/utils.c	2020-10-01 20:31:32.951590892 +0300
@@ -775,7 +775,7 @@
 		return P_tmpdir;
 #endif
 	else
-		return "/tmp";
+		return "@TERMUX_PREFIX@/tmp";
 }
 
 /*