Margo build fails

[jogramming]

I decided to try out the development branch with go1.11 beta2 and i couldn't get it working:

GoSublime r18.05.19-1 sh: go version: `go1.11beta2` (raw version string `go1.11beta2`)
GoSublime r18.05.19-1 sh: shell bootstrap took 1.731s
GoSublime r18.05.19-1: margo.init()
GoSublime r18.05.19-1: mg9.init()
[21:04:45] margo: Stopping agent. GOPATH changed: `` -> `D:\gp`
[21:04:45] margo: agent#007: starting
GoSublime r18.05.19-1: _after.init()

** 2018-07-22 21:04:45.184150 **:
GoSublime init r18.05.19-1 (0.001s)
|   install margo: no
|   install state: done
| sublime.version: 3176
| sublime.channel: stable
|       about.ann: a18.07.17-1
|   about.version: r18.05.19-1
|         version: r18.05.19-1
|        platform: windows-x64
|            ~bin: ~\AppData\Roaming\Sublime Text 3\Packages\User\GoSublime\windows-x64\bin
|       margo.exe: ~bin\gosublime.margo_r18.05.19-1_go1.11beta2.exe (ok)
|          go.exe: C:\Go\bin\go.exe (ok)
|      go.version: go1.11beta2
|          GOROOT: C:\Go\
|          GOPATH: D:\gp
|           GOBIN: (not set)
|       set.shell: []
|       env.shell:
|       shell.cmd: ['C:\\WINDOWS\\system32\\cmd.exe', '/C', '${CMD}']
|    sh.bootstrap: 
|                > 	WARNING: GOPATH is different between your shell and ST/GUI environments
|                > 	     shell.GOPATH: D:\gp
|                > 	    st/gui.GOPATH: ~\go
|                > 	using shell env GOPATH=D:\gp
|                > 	using shell env GOROOT=C:\Go\
|                > 	using shell env PATH=~\AppData\Roaming\Sublime Text 3\Packages\GoSublime\bin;~\AppData\Roaming\Sublime Text 3\Packages\User\GoSublime\bin;C:\Go\bin;D:\gp\bin;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files (x86)\GtkSharp\2.12\bin;C:\Program Files\Perforce\;C:\Program Files\PuTTY\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files\Redis\;C:\PostgreSQL\pg10\bin;C:\Program Files\Git\cmd;C:\WINDOWS\System32\OpenSSH\;~\AppData\Local\Microsoft\WindowsApps;~\bin;~\go\bin
|                > 	go version: `go1.11beta2` (raw version string `go1.11beta2`)
|                > 	shell bootstrap took 1.731s
|                >
--------------------------------

  margo: agent#007: ['go', 'install', '-v', 'margo.sh']:
  can't load package: package margo.sh: cannot find package "margo.sh" in any of:
  C:\Go\src\margo.sh (from $GOROOT)
  D:\gp\src\margo.sh (from $GOPATH)
  
[21:04:45] margo: agent#007: ['margo.sh', 'start', 'margo.sublime', '-codec', 'msgpack']
[21:04:45] margo: agent#007: stopping
[21:04:45] margo: agent#007: Cannot start margo: Cannot find command `margo.sh`