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hi - I'm trying to install fleet following the setup instructions here <https://github.com/fleetdm/fleet#try-fleet>
and I'm getting a docker-compose error

```┌──(root💀kali)-[~]
└─# fleetctl preview
Downloading dependencies into /root/.fleet/preview...
Pulling Docker dependencies...
Invalid interpolation format for "fleet01" option in service "services": "fleetdm/fleet:${FLEET_VERSION:-latest}"

Failed to run docker-compose```
Can anyone help me with this?

hi! Sorry to hear you're having issues running the preview. It looks like it's not able to pull the docker images. Does `env | grep FLEET_VERSION`  return anything?

```┌──(root💀kali)-[~]
└─# env | grep FLEET_VERSION```
not by default, however I have set that variable to "v4.0.1" and "4.0.1" and get the same result

```┌──(root💀kali)-[~]
└─# echo ${FLEET_VERSION:-latest}                                        1 ⨯
v4.0.1
                                                                             
┌──(root💀kali)-[~]
└─# env | grep FLEET_VERSION             
FLEET_VERSION=v4.0.1
                                                                             
┌──(root💀kali)-[~]
└─# fleetctl preview                     
Downloading dependencies into /root/.fleet/preview...
Pulling Docker dependencies...
Invalid interpolation format for "fleet01" option in service "services": "fleetdm/fleet:${FLEET_VERSION:-latest}"

Failed to run docker-compose```

I get the same error on Ubuntu as well
```server@ubuntu:~$ sudo fleetctl preview
[sudo] password for server: 
Downloading dependencies into /root/.fleet/preview...
Pulling Docker dependencies...
Invalid interpolation format for "fleet01" option in service "services": "fleetdm/fleet:${FLEET_VERSION:-latest}"

Failed to run docker-compose```

works on my mac though, unfortunately I need it to work on these VMs

could you try running `unset FLEET_VERSION` and try again? The latest is 4.0.1 currently anyway

```server@ubuntu:~$ unset FLEET_VERSION
server@ubuntu:~$ env | grep FLEET
server@ubuntu:~$ sudo fleetctl preview
Downloading dependencies into /root/.fleet/preview...
Pulling Docker dependencies...
Invalid interpolation format for "fleet01" option in service "services": "fleetdm/fleet:${FLEET_VERSION:-latest}"

Failed to run docker-compose```

that is odd, I'll investigate. In the meantime, so that I understand, what limitation are you encountering running preview on mac?

just for requirements of the project I'm working on

can you run `docker-compose --version`? or if using the latest docker desktop docker compose is now bundled into the docker binary so you can run `docker compose version`

I'm using <https://docs.docker.com/compose/install/> now instead of from apt install

yeah I had a feeling this was a docker-compose issue, glad everything got sorted out though