The below patch should allow both building for and building on 9front. You may want to update DefaultUnixConfigLocation in config/configuration.go.

diff --git a/config/configuration.go b/config/configuration.go
index 5112d1ec..fe12e803 100644
--- a/config/configuration.go
+++ b/config/configuration.go
@@ -25,7 +25,7 @@ var (
        DefaultConfigFiles = []string{"config.yml", "config.yaml"}

        // DefaultUnixConfigLocation is the primary location to find a config file
-	DefaultUnixConfigLocation = "/usr/local/etc/cloudflared"
+	DefaultUnixConfigLocation = "/sys/lib/cloudflared"

        // DefaultUnixLogLocation is the primary location to find log files
        DefaultUnixLogLocation = "/var/log/cloudflared"
diff --git a/watcher/file.go b/watcher/file.go
index 369abe67..a00af9ef 100644
--- a/watcher/file.go
+++ b/watcher/file.go
@@ -1,62 +1,61 @@
 package watcher

 import (
-	"github.com/fsnotify/fsnotify"
+//	"github.com/fsnotify/fsnotify"
 )

 // File is a file watcher that notifies when a file has been changed
 type File struct {
-	watcher  *fsnotify.Watcher
+	//	watcher  *fsnotify.Watcher
        shutdown chan struct{}
 }

 // NewFile is a standard constructor
 func NewFile() (*File, error) {
-	watcher, err := fsnotify.NewWatcher()
-	if err != nil {
-		return nil, err
-	}
-	f := &File{
-		watcher:  watcher,
-		shutdown: make(chan struct{}),
-	}
-	return f, nil
+	//	watcher, err := fsnotify.NewWatcher()
+	return nil, nil
+	// 	f := &File{
+	// 		watcher:  watcher,
+	// 		shutdown: make(chan struct{}),
+	// 	}
+	// 	return f, nil
 }

 // Add adds a file to start watching
 func (f *File) Add(filepath string) error {
-	return f.watcher.Add(filepath)
+	return nil
+	//return f.watcher.Add(filepath)
 }

 // Shutdown stop the file watching run loop
 func (f *File) Shutdown() {
        // don't block if Start quit early
-	select {
-	case f.shutdown <- struct{}{}:
-	default:
-	}
+	// select {
+	// case f.shutdown <- struct{}{}:
+	// default:
+	// }
 }

 // Start is a runloop to watch for files changes from the file paths added from Add()
 func (f *File) Start(notifier Notification) {
-	for {
-		select {
-		case event, ok := <-f.watcher.Events:
-			if !ok {
-				return
-			}
-			if event.Op&fsnotify.Write == fsnotify.Write {
-				notifier.WatcherItemDidChange(event.Name)
-			}
-		case err, ok := <-f.watcher.Errors:
-			if !ok {
-				return
-			}
-			notifier.WatcherDidError(err)
+	// for {
+	// 	select {
+	// 	case event, ok := <-f.watcher.Events:
+	// 		if !ok {
+	// 			return
+	// 		}
+	// 		if event.Op&fsnotify.Write == fsnotify.Write {
+	// 			notifier.WatcherItemDidChange(event.Name)
+	// 		}
+	// 	case err, ok := <-f.watcher.Errors:
+	// 		if !ok {
+	// 			return
+	// 		}
+	// 		notifier.WatcherDidError(err)

-		case <-f.shutdown:
-			f.watcher.Close()
-			return
-		}
-	}
+	// 	case <-f.shutdown:
+	// 		f.watcher.Close()
+	// 		return
+	// 	}
+	// }
 }