"Couldn't posix_spawn: error 8" - no plugins work, despite running from console.

[JimmySpivey]

I have tried a custom plugin as well as one of the weather plugins. Both produce this error, the application was recently installed for the first time. If I go to "Run in Terminal..." the plugin works as expected and prints to standard out.

My specs:

System Software Overview:

System Version: OS X 10.10.5 (14F1021)
Kernel Version: Darwin 14.5.0
Boot Volume: Macintosh HD
Boot Mode: Normal
Secure Virtual Memory: Enabled
Time since boot: 49 days 1:17

Hardware Overview:

Model Name: MacBook Pro
Model Identifier: MacBookPro11,1
Processor Name: Intel Core i5
Processor Speed: 2.6 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 3 MB
Memory: 8 GB
Boot ROM Version: MBP111.0138.B16
SMC Version (system): 2.16f68
Serial Number (system): C02NJ1ZMG3QH
Hardware UUID: 0B874326-70FA-583A-A874-BCC58FA021E8

Bash version:
$ bash --version
GNU bash, version 4.3.42(1)-release (x86_64-apple-darwin14.5.0)
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Note, I am using gnu core utils and not the default osx commands (ie: commands such as ls is from gnu core utils and not the default packaged command that comes with osx). For example, my ls version is not the OSX default:

$ ls --version
ls (GNU coreutils) 8.24
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Richard M. Stallman and David MacKenzie.

[JimmySpivey]

I meant to submit this to the main project, not the plugin project: matryer/xbar#173