From 3cae4064dca55abe91d1133c37db3a7f7ace0fa0 Mon Sep 17 00:00:00 2001
From: Karan Misra <kidoman@gmail.com>
Date: Sun, 2 Mar 2014 19:39:30 +0530
Subject: [PATCH] be specific about the unsupported host

---
 host/descriptor.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/host/descriptor.go b/host/descriptor.go
index 2805b09..5f89fc7 100644
--- a/host/descriptor.go
+++ b/host/descriptor.go
@@ -1,6 +1,6 @@
 package host
 
-import "errors"
+import "fmt"
 
 type Descriptor struct {
 	GPIO func() interface{}
@@ -19,7 +19,7 @@ func Describe() (*Descriptor, error) {
 
 	describer, ok := Describers[host]
 	if !ok {
-		return nil, errors.New("host: invalid host")
+		return nil, fmt.Errorf("host: invalid host %q", host)
 	}
 
 	return describer(rev), nil