go build -a tries to rebuild stdlib

[remexre]

When using godo to build with a very simple Gododir/main.go:

package main

import (
    "time"

    "gopkg.in/godo.v2"
)

func tasks(p *godo.Project) {
    p.Task("default", godo.S{"server"}, nil)

    p.Task("server", nil, func(c *godo.Context) {
        c.Start("main.go", godo.M{"$in": "cmd/server"})
    }).Src("**/*.go").Debounce(100 * time.Millisecond)
}

func main() {
    godo.Godo(tasks)
}

I get the following error:

$ godo
server rebuilding with -a to ensure clean build (might take awhile)
go install runtime/internal/sys: open /usr/lib/go/pkg/linux_amd64/runtime/internal/sys.a: permission denied
ERR "default>server": exit status 1
line=0
2016/10/19 01:12:40 exit status 1

this may be relevant