diff --git a/js/misc/config.js.in b/js/misc/config.js.in
index e8ad9d9e4..f296275ca 100644
--- a/js/misc/config.js.in
+++ b/js/misc/config.js.in
@@ -14,6 +14,6 @@ var GETTEXT_PACKAGE = '@GETTEXT_PACKAGE@';
 var LOCALEDIR = '@datadir@/locale';
 /* other standard directories */
 var LIBEXECDIR = '@libexecdir@';
-var SYSCONFDIR = '@sysconfdir@';
+var NMPREFIXDIR = '@nmprefixdir@';
 /* g-i package versions */
 var LIBMUTTER_API_VERSION = '@LIBMUTTER_API_VERSION@'
diff --git a/js/misc/meson.build b/js/misc/meson.build
index 20489496c..bbdc0411e 100644
--- a/js/misc/meson.build
+++ b/js/misc/meson.build
@@ -7,7 +7,7 @@ jsconf.set10('HAVE_BLUETOOTH', bt_dep.found())
 jsconf.set10('HAVE_NETWORKMANAGER', have_networkmanager)
 jsconf.set('datadir', datadir)
 jsconf.set('libexecdir', libexecdir)
-jsconf.set('sysconfdir', sysconfdir)
+jsconf.set('nmprefixdir', nm_prefix)
 
 config_js = configure_file(
   input: 'config.js.in',
diff --git a/js/ui/components/networkAgent.js b/js/ui/components/networkAgent.js
index fd59c11ca..1086483f1 100644
--- a/js/ui/components/networkAgent.js
+++ b/js/ui/components/networkAgent.js
@@ -587,7 +587,7 @@ var NetworkAgent = new Lang.Class({
         this._vpnRequests = { };
         this._notifications = { };
 
-        this._pluginDir = Gio.file_new_for_path(GLib.build_filenamev([Config.SYSCONFDIR, 'NetworkManager/VPN']));
+        this._pluginDir = Gio.file_new_for_path(GLib.build_filenamev([Config.NMPREFIXDIR, 'lib/NetworkManager/VPN']));
         try {
             let monitor = this._pluginDir.monitor(Gio.FileMonitorFlags.NONE, null);
             monitor.connect('changed', () => { this._vpnCacheBuilt = false; });
diff --git a/meson.build b/meson.build
index 988fcb749..e9854e3a9 100644
--- a/meson.build
+++ b/meson.build
@@ -43,7 +43,6 @@ datadir = join_paths(prefix, get_option('datadir'))
 libdir = join_paths(prefix, get_option('libdir'))
 libexecdir = join_paths(prefix, get_option('libexecdir'))
 mandir = join_paths(prefix, get_option('mandir'))
-sysconfdir = join_paths(prefix, get_option('sysconfdir'))
 
 pkgdatadir = join_paths(datadir, meson.project_name())
 pkglibdir = join_paths(libdir, meson.project_name())
@@ -113,6 +112,13 @@ else
   have_networkmanager = false
 endif
 
+networkmanager_dep = dependency('NetworkManager', required: false)
+if (networkmanager_dep.found())
+  nm_prefix = networkmanager_dep.get_pkgconfig_variable('prefix')
+else
+  nm_prefix = prefix
+endif
+
 if get_option('systemd')
   systemd_dep = dependency('libsystemd')
   have_systemd = systemd_dep.found()
diff --git a/src/meson.build b/src/meson.build
index 3e5557351..ff7e0662d 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -13,7 +13,6 @@ script_data.set('libdir', libdir)
 script_data.set('libexecdir', libexecdir)
 script_data.set('pkgdatadir', pkgdatadir)
 script_data.set('pkglibdir', pkglibdir)
-script_data.set('sysconfdir', sysconfdir)
 script_data.set('PYTHON', python.path())
 script_data.set('VERSION', meson.project_version())