diff -uNr i2pd-2.39.0/libi2pd/Config.cpp i2pd-2.39.0.mod/libi2pd/Config.cpp
--- i2pd-2.39.0/libi2pd/Config.cpp	2021-08-23 17:03:26.000000000 +0300
+++ i2pd-2.39.0.mod/libi2pd/Config.cpp	2021-11-06 21:44:21.097504481 +0200
@@ -34,11 +34,11 @@
 		general.add_options()
 			("help",                                                          "Show this message")
 			("version",                                                       "Show i2pd version")
-			("conf", value<std::string>()->default_value(""),                 "Path to main i2pd config file (default: try ~/.i2pd/i2pd.conf or /var/lib/i2pd/i2pd.conf)")
-			("tunconf", value<std::string>()->default_value(""),              "Path to config with tunnels list and options (default: try ~/.i2pd/tunnels.conf or /var/lib/i2pd/tunnels.conf)")
-			("tunnelsdir", value<std::string>()->default_value(""),           "Path to extra tunnels' configs folder (default: ~/.i2pd/tunnels.d or /var/lib/i2pd/tunnels.d")
-			("certsdir", value<std::string>()->default_value(""),             "Path to certificates used for verifying .su3, families (default: ~/.i2pd/certificates or /var/lib/i2pd/certificates")
-			("pidfile", value<std::string>()->default_value(""),              "Path to pidfile (default: ~/i2pd/i2pd.pid or /var/lib/i2pd/i2pd.pid)")
+			("conf", value<std::string>()->default_value(""),                 "Path to main i2pd config file (default: try ~/.i2pd/i2pd.conf or @TERMUX_PREFIX@/var/lib/i2pd/i2pd.conf)")
+			("tunconf", value<std::string>()->default_value(""),              "Path to config with tunnels list and options (default: try ~/.i2pd/tunnels.conf or @TERMUX_PREFIX@/var/lib/i2pd/tunnels.conf)")
+			("tunnelsdir", value<std::string>()->default_value(""),           "Path to extra tunnels' configs folder (default: ~/.i2pd/tunnels.d or @TERMUX_PREFIX@/var/lib/i2pd/tunnels.d")
+			("certsdir", value<std::string>()->default_value(""),             "Path to certificates used for verifying .su3, families (default: ~/.i2pd/certificates or @TERMUX_PREFIX@/var/lib/i2pd/certificates")
+			("pidfile", value<std::string>()->default_value(""),              "Path to pidfile (default: ~/i2pd/i2pd.pid or @TERMUX_PREFIX@/var/lib/i2pd/i2pd.pid)")
 			("log", value<std::string>()->default_value(""),                  "Logs destination: stdout, file, syslog (stdout if not set)")
 			("logfile", value<std::string>()->default_value(""),              "Path to logfile (stdout if not set, autodetect if daemon)")
 			("loglevel", value<std::string>()->default_value("warn"),         "Set the minimal level of log messages (debug, info, warn, error, none)")
@@ -58,7 +58,7 @@
 			("reservedrange", bool_switch()->default_value(true),             "Check remote RI for being in blacklist of reserved IP ranges (default: enabled)")
 			("netid", value<int>()->default_value(I2PD_NET_ID),               "Specify NetID. Main I2P is 2")
 			("daemon", bool_switch()->default_value(false),                   "Router will go to background after start (default: disabled)")
-			("service", bool_switch()->default_value(false),                  "Router will use system folders like '/var/lib/i2pd' (default: disabled)")
+			("service", bool_switch()->default_value(false),                  "Router will use system folders like '@TERMUX_PREFIX@/var/lib/i2pd' (default: disabled)")
 			("notransit", bool_switch()->default_value(false),                "Router will not accept transit tunnels at startup (default: disabled)")
 			("floodfill", bool_switch()->default_value(false),                "Router will be floodfill (default: disabled)")
 			("bandwidth", value<std::string>()->default_value(""),            "Bandwidth limit: integer in KBps or letters: L (32), O (256), P (2048), X (>9000)")
diff -uNr i2pd-2.39.0/libi2pd/FS.cpp i2pd-2.39.0.mod/libi2pd/FS.cpp
--- i2pd-2.39.0/libi2pd/FS.cpp	2021-08-23 17:03:26.000000000 +0300
+++ i2pd-2.39.0.mod/libi2pd/FS.cpp	2021-11-06 21:41:30.409511991 +0200
@@ -121,11 +121,11 @@
 		// otherwise use /data/files
 		char *home = getenv("HOME");
 		if (isService) {
-			dataDir = "/var/lib/" + appName;
+			dataDir = "@TERMUX_PREFIX@/var/lib/" + appName;
 		} else if (home != NULL && strlen(home) > 0) {
 			dataDir = std::string(home) + "/." + appName;
 		} else {
-			dataDir = "/tmp/" + appName;
+			dataDir = "@TERMUX_PREFIX@/tmp/" + appName;
 		}
 		return;
 #endif