尝试执行gunicorn时找不到Pyenv命令

Question

我开始使用nginx，gunicorn，mysql和超级用户在Django中实现一个webapp，并将pyenv与virtualenv结合使用。我一直在遵循配置Gunicorn的教程，我的shell脚本有如下代码：

NAME="myapp"                                   # Name of the application
DJANGODIR=/home/myapp/myapp            # Django project directory
SOCKFILE=/home/myapp/run/gunicorn.sock   # we will communicate using this unix socket
USER=myappuser                                     # The user to run as
GROUP=webdata                                   # The group to run as
NUM_WORKERS=3                                   # How many worker processes should Gunicorn spawn
DJANGO_SETTINGS_MODULE=myapp.settings_production          # Which settings file should Django use
DJANGO_WSGI_MODULE=myapp.wsgi                  # WSGI module name

echo "Starting $NAME as `whoami`"

# Activate the virtual environment
cd $DJANGODIR
pyenv activate env
export DJANGO_SETTINGS_MODULE=$DJANGO_SETTINGS_MODULE
export PYTHONPATH=$DJANGODIR:$PYTHONPATH

# Create the run directory if it doesn't exist
RUNDIR=$(dirname $SOCKFILE)
test -d $RUNDIR || mkdir -p $RUNDIR

# Start your Django Unicorn
exec gunicorn ${DJANGO_WSGI_MODULE}:application \
  --name $NAME \
  --workers $NUM_WORKERS \
  --user $USER \
  --bind=unix:$SOCKFILE

问题在于，主管日志输出始终显示：pyenv命令未找到，而exec：gunicorn：未找到，我想这是因为pyenv指令不适用于shell脚本，但是我不知道如何我已修复，任何人都可以帮助我，并向我解释缺少的内容？