No Binary After `Go Get`

[zQueal]

Running go get -u -v github.com/shadowsocks/go-shadowsocks2 returns;

user@na01:~# go get -u -v github.com/shadowsocks/go-shadowsocks2
github.com/shadowsocks/go-shadowsocks2 (download)
github.com/Yawning/chacha20 (download)
Fetching https://golang.org/x/crypto/chacha20poly1305?go-get=1
Parsing meta tags from https://golang.org/x/crypto/chacha20poly1305?go-get=1 (status code 200)
get "golang.org/x/crypto/chacha20poly1305": found meta tag main.metaImport{Prefix:"golang.org/x/crypto", VCS:"git", RepoRoot:"https://go.googlesource.com/crypto"} at https://golang.org/x/crypto/chacha20poly1305?go-get=1
get "golang.org/x/crypto/chacha20poly1305": verifying non-authoritative meta tag
Fetching https://golang.org/x/crypto?go-get=1
Parsing meta tags from https://golang.org/x/crypto?go-get=1 (status code 200)
golang.org/x/crypto (download)
Fetching https://golang.org/x/crypto/hkdf?go-get=1
Parsing meta tags from https://golang.org/x/crypto/hkdf?go-get=1 (status code 200)
get "golang.org/x/crypto/hkdf": found meta tag main.metaImport{Prefix:"golang.org/x/crypto", VCS:"git", RepoRoot:"https://go.googlesource.com/crypto"} at https://golang.org/x/crypto/hkdf?go-get=1
get "golang.org/x/crypto/hkdf": verifying non-authoritative meta tag
Fetching https://golang.org/x/crypto?go-get=1
Parsing meta tags from https://golang.org/x/crypto?go-get=1 (status code 200)
golang.org/x/crypto/chacha20poly1305/internal/chacha20
golang.org/x/crypto/poly1305
# golang.org/x/crypto/poly1305
go/src/golang.org/x/crypto/poly1305/sum_amd64.s:8 6a: No such file or directory: textflag.h
golang.org/x/crypto/hkdf
github.com/Yawning/chacha20
# github.com/Yawning/chacha20
go/src/github.com/Yawning/chacha20/chacha20_amd64.s:936 redeclaration of rounds_loop4_begin
go/src/github.com/Yawning/chacha20/chacha20_amd64.s:1077 redeclaration of rounds_loop2_begin
github.com/shadowsocks/go-shadowsocks2/socks

All seems well, but there is no runable binary in my $GOPATH.

Go Version: go version go1.3.3 linux/amd64

[riobard]

Please try latest version of Go.

[zQueal]

Seems to have been a limitation of old packages from my VPS provider. I was working with Ubuntu 15 which only had access to go1.3.3.

After hacking away and finally finding a way to upgrade to Ubuntu 16 I was able to install go1.6.2 and finally go get [...] worked fine.

Thanks!