$ ./pants clean-all go-env contrib/go/examples/:: -- echo \$GOPATH | tr : '\n'
...
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.src.go.libC.libC
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.3rdparty.go.github.com.gorilla.context.context
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.3rdparty.go.github.com.robertkrimen.otto.otto
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.3rdparty.go.github.com.kr.pretty.pretty
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.src.go.libE.libE
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.3rdparty.go.github.com.bitly.go-simplejson.go-simplejson
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.3rdparty.go.gopkg.in.fsnotify.v0.fsnotify.v0
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.src.go.hello.hello
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.src.go.libA.libA
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.3rdparty.go.github.com.cbroglie.mapstructure.mapstructure
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.3rdparty.go.github.com.kr.text.text
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.src.go.libD.libD
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.3rdparty.go.github.com.bmizerany.assert.assert
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.src.go.cgo.cgo
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.3rdparty.go.github.com.gorilla.mux.mux
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.3rdparty.go.gopkg.in.check.v1.check.v1
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.src.go.server.server
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.3rdparty.go.github.com.AdRoll.goamz.dynamodb
/home/jsirois/dev/pantsbuild/jsirois-pants/.pants.d/go-env/go-env/contrib.go.examples.src.go.libB.libB