使用超级用户运行Golang程序时无法识别的GOPATH

I have a Golang program implementing a web server. It is expected to be running continuously, and incase of any unexpected failure or crash, to restart itself. For that, I am trying to configure it as a UNIX-process using supervisord. However, the issue I am facing is that the external go libraries included in the code aren't getting recognised as supervisord is unable to recognise the GOPATH. This is leading to errors such as:

web_server.go:11:2: cannot find package "github.com/gorilla/mux" in any of:
    /usr/lib/go/src/github.com/gorilla/mux (from $GOROOT)
    ($GOPATH not set)

when running the web server using supervisord. The supervisord configuration for my web server is:

[program:web_server]
command=go run web_server.go
directory=/home/ubuntu
autostart=true
autorestart=true
startretries=5
stderr_logfile=/home/ubuntu/err_logs/web_server.err.log
stderr_logfile_maxbytes=1MB
stderr_logfile_backups=10

What is the workaround for this?

One important property of supervisord as stated here, that I had been missing out is:

Subprocesses will inherit the environment of the shell used to start the supervisord program. Several environment variables will be set by supervisord itself in the child’s environment also, including SUPERVISOR_ENABLED (a flag indicating the process is under supervisor control), SUPERVISOR_PROCESS_NAME (the config-file-specified process name for this process) and SUPERVISOR_GROUP_NAME (the config-file-specified process group name for the child process).

These environment variables may be overridden within the [supervisord] section config option named environment (applies to all subprocesses) or within the per- [program:x] section environment config option (applies only to the subprocess specified within the [program:x] section).

Therefore, adding the GOPATH in the environment variable solved the issue.

[program:web_server]
command=go run web_server.go
directory=/home/ubuntu
autostart=true
autorestart=true
startretries=5
stderr_logfile=/home/ubuntu/err_logs/web_server.err.log
stderr_logfile_maxbytes=1MB
stderr_logfile_backups=10
environment=GOPATH="/home/ubuntu"