我正在尝试安装web.go，但正在运行go get github.com/hoisie/webreturn

package bufio: unrecognized import path "bufio"
package bytes: unrecognized import path "bytes"
package crypto/rand: unrecognized import path "crypto/rand"
package crypto/sha1: unrecognized import path "crypto/sha1"
package crypto/tls: unrecognized import path "crypto/tls"
package encoding/base64: unrecognized import path "encoding/base64"
package encoding/binary: unrecognized import path "encoding/binary"
package encoding/json: unrecognized import path "encoding/json"
package errors: unrecognized import path "errors"
package fmt: unrecognized import path "fmt"

在使用各种软件包之前，这种情况会持续一段时间，然后再返回其他任何内容。go env给我：

GOARCH="amd64"
GOBIN="/usr/local/go/bin"
GOCHAR="6"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH=""
GORACE=""
GOROOT="/home/me/go"
GOTOOLDIR="/home/me/go/pkg/tool/linux_amd64"
TERM="dumb"
CC="gcc"
GOGCCFLAGS="-g -O2 -fPIC -m64 -pthread"
CXX="g++"
CGO_ENABLED="1"

如何安装web.go？在github页面的自述文件中使用了go get（而不是go install）。我的Go版本是go version go1.2 linux/amd64。