# Failed to install vcap library on Ubuntu 18.04.4?

**URL:** <https://forum.aotu.ai/t/failed-to-install-vcap-library-on-ubuntu-18-04-4/116>\
**Category:** Questions\
**Created:** [September 10, 2020, 6:02am UTC](https://forum.aotu.ai/t/failed-to-install-vcap-library-on-ubuntu-18-04-4/116 "2020-09-10T06:02:16Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![tianguang](https://avatars.discourse-cdn.com/v4/letter/t/4da419/32.png) [@tianguang](https://forum.aotu.ai/u/tianguang)\
**Post date:** [September 10, 2020, 6:02am UTC](https://forum.aotu.ai/t/failed-to-install-vcap-library-on-ubuntu-18-04-4/116/1 "2020-09-10T06:02:16Z")

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installation of vcap and vcap\_utils failed on my Ubuntu machine, the error message is:  
Could not find a version that satisfies the requirement tensorflow-gpu==1.15.2 (from vcap) (from versions: 0.12.1, 1.0.0, 1.0.1, 1.1.0, 1.2.0, 1.2.1, 1.3.0, 1.4.0, 1.4.1, 1.5.0, 1.5.1, 1.6.0, 1.7.0, 1.7.1, 1.8.0, 1.9.0, 1.10.0, 1.10.1, 1.11.0, 1.12.0, 1.12.2, 1.12.3, 1.13.1, 1.13.2, 1.14.0, 2.0.0a0, 2.0.0b0, 2.0.0b1)  
No matching distribution found for tensorflow-gpu==1.15.2 (from vcap)

could anyone help me to fix it?

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<div class="post-metadata">

**Author:** ![tyler.compton](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.aotu.ai/tyler.compton/32/27_2.png) [@tyler.compton](https://forum.aotu.ai/u/tyler.compton)\
**Post date:** [September 10, 2020, 7:20am UTC](https://forum.aotu.ai/t/failed-to-install-vcap-library-on-ubuntu-18-04-4/116/2 "2020-09-10T07:20:34Z")

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Hi tianguang, welcome to the forum!

This error usually means that you’re using an unsupported version of Python. Right now, vcap and vcap-utils only support up to Python 3.6, because that’s the highest version that Tensorflow 1.x supports.

In order to install Python 3.6 on Ubuntu 20.04, I would recommend using the deadsnakes PPA.

```auto
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt update
sudo apt install python3.6

```

Then, you can create a virtualenv that uses this Python executable. If you’re using virtualenvwrapper, you would do it like this:

```auto
mkvirtualenv -p /usr/bin/python3.6 capsule_dev

```

Then, you should be able to install vcap and vcap-utils without issue. Let me know how it goes for you!