我已将goappengine更新到最后一个版本，我收到此错误消息。看起来它正在寻找Go 1.4.2而我正在运行1.5.2 ??我不太可能以前运行1.4。 问题的任何指针
➜ dev git:(master) ✗ goapp serve
INFO 2016-01-25 02:31:53,808 devappserver2.py:769] Skipping SDK update check.
INFO 2016-01-25 02:31:53,832 api_server.py:205] Starting API server at: http://localhost:65025
INFO 2016-01-25 02:31:53,836 dispatcher.py:197] Starting module "default" running at: http://localhost:8080
INFO 2016-01-25 02:31:53,839 admin_server.py:116] Starting admin server at: http://localhost:8000
ERROR 2016-01-25 02:31:55,105 go_runtime.py:179] Failed to build Go application: (Executed command: /Users/moon/go_appengine/goroot/bin/go-app-builder -app_base /Users/moon/Downloads/d1/d2 -arch 6 -dynamic -goroot /Users/moon/go_appengine/goroot -nobuild_files ^^$ -unsafe -gopath /Users/moon/gopath:/Users/moon/go_appengine/goroot -binary_name _go_app -extra_imports appengine_internal/init -work_dir /var/folders/75/xlk18qb10231fqxqmdwg_xhm0000gn/T/tmpf1CeKbappengine-go-bin -gcflags -I,/Users/moon/go_appengine/goroot/pkg/darwin_amd64_appengine -ldflags -L,/Users/moon/go_appengine/goroot/pkg/darwin_amd64_appengine beta.go main.go)
/var/folders/75/xlk18qb10231fqxqmdwg_xhm0000gn/T/tmpf1CeKbappengine-go-bin/beta.go:9: import /Users/moon/go_appengine/goroot/pkg/darwin_amd64/appengine.a: object is [darwin amd64 go1.5.2 X:none] expected [darwin amd64 go1.4.2 (appengine-1.9.31) X:precisestack]
2016/01/25 04:31:55 go-app-builder: build timing: 1×6g (11ms total), 0×6l (0 total)
2016/01/25 04:31:55 go-app-builder: failed running 6g: exit status 1
^Cgoapp: caught SIGINT, waiting for dev_appserver.py to shut down
INFO 2016-01-25 02:32:19,423 shutdown.py:45] Shutting down.
INFO 2016-01-25 02:32:19,423 api_server.py:648] Applying all pending transactions and saving the datastore
INFO 2016-01-25 02:32:19,423 api_server.py:651] Saving search indexes
➜ dev git:(master) ✗ goapp version
go version go1.4.2 (appengine-1.9.31) darwin/amd64
➜ dev git:(master) ✗ go version
go version go1.5.2 darwin/amd64
➜ dev git:(master) ✗
➜ dev git:(master) ✗echo $GOPATH
/Users/moon/gopath:/Users/moon/go_appengine/goroot