Building tools with brew installed go fails

[ace@h ~]$ brew install go

==> Downloading http://go.googlecode.com/files/go1.0.3.src.tar.gz

Already downloaded: /Library/Caches/Homebrew/go-1.0.3.tar.gz

==> ./make.bash --no-clean

==> Caveats

Bash completion has been installed to:

  /usr/local/etc/bash_completion.d

zsh completion has been installed to:

  /usr/local/share/zsh/site-functions

==> Summary

 /usr/local/Cellar/go/1.0.3: 3345 files, 100M, built in 19 seconds

[ace@h ~]$ cd mongo-tools/

[ace@h mongo-tools]$ ls

Godeps                bin                   common                legacy                mongodump             mongoimport           mongostat             set_gopath_windows.sh

Makefile              bsondump              common.yml            legacy-notes.md       mongoexport           mongooplog            mongotop              vendor

README.md             build.sh              go.sh                 legacy26              mongofiles            mongorestore          set_gopath.sh         vendor.sh

[ace@h mongo-tools]$ . set_gopath.sh

[ace@h mongo-tools]$ mkdir bin

mkdir: bin: File exists

[ace@h mongo-tools]$ for i in bsondump mongostat mongofiles mongoexport mongoimport mongorestore mongodump mongotop mongooplog; do

> go build -o "bin/$i" $i/main/$i.go

> done

.gopath/src/github.com/mongodb/mongo-tools/common/json/decode.go:12:2: no Go source files in /usr/local/Cellar/go/1.0.3/src/pkg/encoding

.gopath/src/github.com/mongodb/mongo-tools/common/json/decode.go:12:2: no Go source files in /usr/local/Cellar/go/1.0.3/src/pkg/encoding

.gopath/src/github.com/mongodb/mongo-tools/common/json/decode.go:12:2: no Go source files in /usr/local/Cellar/go/1.0.3/src/pkg/encoding

.gopath/src/github.com/mongodb/mongo-tools/common/json/decode.go:12:2: no Go source files in /usr/local/Cellar/go/1.0.3/src/pkg/encoding

.gopath/src/github.com/mongodb/mongo-tools/common/json/decode.go:12:2: no Go source files in /usr/local/Cellar/go/1.0.3/src/pkg/encoding

.gopath/src/github.com/mongodb/mongo-tools/common/json/decode.go:12:2: no Go source files in /usr/local/Cellar/go/1.0.3/src/pkg/encoding

.gopath/src/github.com/mongodb/mongo-tools/common/json/decode.go:12:2: no Go source files in /usr/local/Cellar/go/1.0.3/src/pkg/encoding

.gopath/src/github.com/mongodb/mongo-tools/common/json/decode.go:12:2: no Go source files in /usr/local/Cellar/go/1.0.3/src/pkg/encoding

.gopath/src/github.com/mongodb/mongo-tools/common/json/decode.go:12:2: no Go source files in /usr/local/Cellar/go/1.0.3/src/pkg/encoding

[ace@h mongo-tools]$ ls bin/

[ace@h mongo-tools]$