diff --git a/debian/postinst b/debian/postinst
new file mode 100644
index 0000000..6d3ee77
--- /dev/null
+++ b/debian/postinst
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+set -e
+
+# Update the the dbus user to logname
+dbus_conf = /usr/share/dbus-1/system.d/com.yuezk.qt.GPService.conf
+if [ -f $dbus_conf ]; then
+    sed -i "/LOGNAME/,+1s/user=\".*\"/user=\"$(logname)\"/" $dbus_conf
+fi
+
+#DEBHELPER#
diff --git a/debian/rules b/debian/rules
index 5d96a41..6637bfa 100755
--- a/debian/rules
+++ b/debian/rules
@@ -7,12 +7,7 @@ export DEB_LDFLAGS_MAINT_APPEND = -Wl,--as-needed
 
 export DEBIAN_PACKAGE=1
 
-dbus_conf = /usr/share/dbus-1/system.d/com.yuezk.qt.GPService.conf
-
 %:
 	dh $@
 override_dh_installsystemd:
-	# Update the the dbus user to logname
-	if [ -f $(dbus_conf) ] ; then sed -i "/LOGNAME/,+1s/user=\".*\"/user=\"`logname`\"/" $(dbus_conf) ; fi
-
 	dh_installsystemd gpservice.service