# Install dependencies on EC2Cluster
**URL:** https://dask.discourse.group/t/install-dependencies-on-ec2cluster/3579
**Category:** Distributed
**Created:** [October 17, 2024, 2:46pm UTC](https://dask.discourse.group/t/install-dependencies-on-ec2cluster/3579 "2024-10-17T14:46:14Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Sacha\_Van\_Weeren](https://dask.discourse.group/u/Sacha_Van_Weeren)
#### Post date: [October 17, 2024, 2:46pm UTC](https://dask.discourse.group/t/install-dependencies-on-ec2cluster/3579/1 "2024-10-17T14:46:14Z")
When start an EC2Cluster with
```auto
cluster = EC2Cluster(region="us-east-1",
# the Name is the IAM role name
iam_instance_profile=
{'Name': 'dask-cluster-ec2-role'},
n_workers=4,
worker_instance_type='t2.medium',
scheduler_instance_type='t2.micro',
security=False)
```
and later try to create a dask dataframe from s3 I get an error message when I run a compute() method. Saying that s3fs is not installed. Is there a way to install this via an argument to EC2Cluster? If not what are alternatives?
---
### Author:  [@guillaumeeb](https://dask.discourse.group/u/guillaumeeb)
#### Post date: [October 18, 2024, 4:45pm UTC](https://dask.discourse.group/t/install-dependencies-on-ec2cluster/3579/2 "2024-10-18T16:45:59Z")
Hi @Sacha_Van_Weeren, welcome to Dask Discourse forum,
I think the easiest solution would be to give some environement variable to the docker images, typically adding a kwarg:
```auto
cluster = EC2Cluster(region="us-east-1",
# the Name is the IAM role name
iam_instance_profile=
{'Name': 'dask-cluster-ec2-role'},
n_workers=4,
worker_instance_type='t2.medium',
scheduler_instance_type='t2.micro',
security=False,
env_vars={'EXTRA_CONDA_PACKAGES': 's3fs'})
```
---
### Author:  [@Sacha\_Van\_Weeren](https://dask.discourse.group/u/Sacha_Van_Weeren)
#### Post date: [October 19, 2024, 3:43pm UTC](https://dask.discourse.group/t/install-dependencies-on-ec2cluster/3579/3 "2024-10-19T15:43:22Z")
Thanks a lot for your response. However when I run the above command. The cluster creations seems to hang. I tried it 2 times with the env-vars and 1 without. Without it continues with it, it gets stuck
---
### Author:  [@guillaumeeb](https://dask.discourse.group/u/guillaumeeb)
#### Post date: [October 24, 2024, 11:45am UTC](https://dask.discourse.group/t/install-dependencies-on-ec2cluster/3579/4 "2024-10-24T11:45:48Z")
Maybe I didn’t give the correct syntax. Do you have some output logs of the containers start?
Another method a bit more complex would be to build you own docker image based on the Dask one with added dependencies. Ot you could use existing ones like the [Pangeo docker images](https://github.com/pangeo-data/pangeo-docker-images).
cc @jacobtomlinson