Alpaca build success (OS X)

andrew@iprozac:~$ mkdir -p build/bin
andrew@iprozac:~$ export GOPATH=~/build/
andrew@iprozac:~$ export GOBIN=~/build/bin
andrew@iprozac:~$ export PATH=$PATH:$GOBIN
andrew@iprozac:~$ go get -d github.com/pksunkara/alpaca
andrew@iprozac:~$ cd build/src/github.com/pksunkara/alpaca/
andrew@iprozac:~/build/src/github.com/pksunkara/alpaca$ git checkout v1
Branch v1 set up to track remote branch v1 from origin.
Switched to a new branch 'v1'
andrew@iprozac:~/build/src/github.com/pksunkara/alpaca$ cd
andrew@iprozac:~$ go build github.com/pksunkara/alpaca
andrew@iprozac:~$ ls -alh build/bin/
total 0
drwxr-xr-x  2 andrew  staff    68B 29 Aug 12:41 .
drwxr-xr-x  4 andrew  staff   136B 29 Aug 12:41 ..
andrew@iprozac:~$ go install github.com/pksunkara/alpaca
andrew@iprozac:~$ ls -alh build/bin/
total 16704
drwxr-xr-x  3 andrew  staff   102B 29 Aug 12:43 .
drwxr-xr-x  5 andrew  staff   170B 29 Aug 12:43 ..
-rwxr-xr-x  1 andrew  staff   8.2M 29 Aug 12:43 alpaca