try setting GOTMPDIR. not sure what this corresponds to on windows, but it will change where the go tool will create its temp files:
$ go run -x t.go WORK=/var/folders/sp/06p28g2d0vs7gd2vhf26wl9m0000gn/T/go-build126372523 [...] $ GOTMPDIR=/tmp/go go run -x t.go WORK=/tmp/go/go-build661115935 [...] -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.