diff -uNr qemu-3.0.0/hw/usb/ccid-card-emulated.c qemu-3.0.0.mod/hw/usb/ccid-card-emulated.c
--- qemu-3.0.0/hw/usb/ccid-card-emulated.c	2018-08-14 22:10:34.000000000 +0300
+++ qemu-3.0.0.mod/hw/usb/ccid-card-emulated.c	2018-10-26 16:49:45.256931721 +0300
@@ -409,7 +409,7 @@
     return 0;
 }
 
-#define CERTIFICATES_DEFAULT_DB "/etc/pki/nssdb"
+#define CERTIFICATES_DEFAULT_DB "@TERMUX_PREFIX@/etc/pki/nssdb"
 #define CERTIFICATES_ARGS_TEMPLATE\
     "db=\"%s\" use_hw=no soft=(,Virtual Reader,CAC,,%s,%s,%s)"