fix build command

`make` alone doesn't work to build alertmanager, throws a pile of errors instead here. `make build` works perfectly fine, though.
2016-02-02 10:27:20 +01:00 · 2016-02-02 10:27:20 +01:00 · 8514db159f
parent c61c017361
commit 8514db159f
1 changed files with 1 additions and 1 deletions
--- a/README.md
+++ b/README.md
@ -34,7 +34,7 @@ $ mkdir -p $GOPATH/src/github.com/prometheus
 $ cd $GOPATH/src/github.com/prometheus
 $ git clone https://github.com/prometheus/alertmanager.git
 $ cd alertmanager
-$ make
+$ make build
 $ ./alertmanager -config.file=<your_file>
 ```