diff --git a/README.md b/README.md
index 3693fb6b0..10527931e 100644
--- a/README.md
+++ b/README.md
@@ -38,10 +38,18 @@ Deps
 
 Ethereum Go makes use of a modified `secp256k1-go` and therefor GMP.
 
-Install
+Ubuntu 12+
+* `apt-get install gmp-dev`
+ 
+OS X 10.9+: 
+* `brew install gmp`
+
+Build
 =======
 
-```go get -u -t github.com/ethereum/go-ethereum```
+* `go get -u -t github.com/ethereum/go-ethereum`
+* `cd $GOPATH/src/github.com/ethereum/go-etherum`
+* `go build`
 
 
 Command line options
diff --git a/test_runner_test.go b/test_runner_test.go
index 0a0b0d69c..5c8461ad8 100644
--- a/test_runner_test.go
+++ b/test_runner_test.go
@@ -27,8 +27,7 @@ func TestTestRunner(t *testing.T) {
 		for key, value := range source.Inputs {
 			trie.Update(key, value)
 		}
-
-		if hex.EncodeToString([]byte(trie.Root)) != source.Expectation {
+		if hex.EncodeToString(trie.Root.([]byte)) != source.Expectation {
 			t.Error("trie root did not match")
 		}
 	})