diff --git a/config.mk b/config.mk
index b1e7ae4..5028817 100644
--- a/config.mk
+++ b/config.mk
@@ -2,10 +2,10 @@
 VERSION = 0.2.3
 
 # paths
-PREFIX = /usr/local
+PREFIX = /
 
 CC = cc
 LD = $(CC)
-CPPFLAGS = -D_BSD_SOURCE -D_GNU_SOURCE
+CPPFLAGS = -D_BSD_SOURCE -D_GNU_SOURCE -I/include -L/lib
 CFLAGS   = -std=c99 -Wall -pedantic $(CPPFLAGS)
-LDFLAGS  = -s
+LDFLAGS  = -s -static -L/lib
diff --git a/smdev.c b/smdev.c
index b774908..092ed31 100644
--- a/smdev.c
+++ b/smdev.c
@@ -2,6 +2,7 @@
 #include <sys/ioctl.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <sys/sysmacros.h>
 
 #include <linux/sockios.h>
 #include <linux/if_packet.h>
diff -u src-a/config.def.h src-b/config.def.h
--- src-a/config.def.h	2020-07-02 05:19:12.016637932 +0000
+++ src-b/config.def.h	2020-07-13 03:26:34.760000000 +0000
@@ -22,6 +22,10 @@
 	{ "tty[0-9]",     "root", "root",  0600, NULL,      NULL                           },
 	{ "tty[0-9][0-9]","root", "tty",   0660, NULL,      NULL                           },
 	{ "ttyS[0-9]*",   "root", "tty",   0660, NULL,      NULL,                          },
+	{ "bus/usb/001/.*",   "root", "root",  0660, "=bus/usb/001/",      NULL,                          },
+	{ "bus/usb/002/.*",   "root", "root",  0660, "=bus/usb/002/",      NULL,                          },
+	{ "bus/usb/003/.*",   "root", "root",  0660, "=bus/usb/003/",      NULL,                          },
+	{ "bus/usb/004/.*",   "root", "root",  0660, "=bus/usb/004/",      NULL,                          },
 	{ "pty.*",        "root", "tty",   0660, NULL,      NULL                           },
 	{ "vcs[0-9]*",    "root", "tty",   0660, NULL,      NULL                           },
 	{ "vcsa*[0-9]*",  "root", "tty",   0660, NULL,      NULL                           },