# Unable to build wheel for pynq

**URL:** <https://discuss.pynq.io/t/unable-to-build-wheel-for-pynq/4419>\
**Category:** Support\
**Created:** [July 2, 2022, 3:54am UTC](https://discuss.pynq.io/t/unable-to-build-wheel-for-pynq/4419 "2022-07-02T03:54:41Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![pratapkygo](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/pratapkygo/32/2686_2.png) [@pratapkygo](https://discuss.pynq.io/u/pratapkygo)\
**Post date:** [July 2, 2022, 3:54am UTC](https://discuss.pynq.io/t/unable-to-build-wheel-for-pynq/4419/1 "2022-07-02T03:54:41Z")

</div>

Greetings,

PYNQ Version : 2.7  
Board : PYNQ Z2

I have built PyTorch v 1.8 following this tutorial [PyTorch on Zybo Z7](https://discuss.pynq.io/t/testing-pytorch-1-8-in-zybo-z7-running-pynq-2-7/4181). However I require pynq package to run on python 3.7 virtual env to access the hdmi ports and the PL for acceleration. When i run`pip3.7 install pynq -v`, I get this output

 ![image](https://us1.discourse-cdn.com/flex019/uploads/pynq1/original/2X/4/427b7e167070e4f40b172f5fea9deab1affe3cfc.png)

But I have installed numpy on the virtual environment as seen below

 ![image](https://us1.discourse-cdn.com/flex019/uploads/pynq1/original/2X/6/6497a67dae48d82f092f53e761bae9cace64aa1f.png)

Any steps that I could follow to resolve this error and install pynq on the venv  
Thanks for the help in advance  
Regards,  
Pratap

---

<div class="post-metadata">

**Author:** ![marioruiz](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/marioruiz/32/2177_2.png) [@marioruiz](https://discuss.pynq.io/u/marioruiz)\
**Post date:** [July 2, 2022, 8:55am UTC](https://discuss.pynq.io/t/unable-to-build-wheel-for-pynq/4419/2 "2022-07-02T08:55:45Z")

</div>

Hi @pratapkygo,

Welcome to our community.  
Virtual environments are a bit tricky. Can you try to install pynq with the switch `--no-build-isolation`?

Mario

---

<div class="post-metadata">

**Author:** ![pratapkygo](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/pratapkygo/32/2686_2.png) [@pratapkygo](https://discuss.pynq.io/u/pratapkygo)\
**Post date:** [July 2, 2022, 3:05pm UTC](https://discuss.pynq.io/t/unable-to-build-wheel-for-pynq/4419/3 "2022-07-02T15:05:31Z")

</div>

Thanks for the quick reply @marioruiz.

It worked. Although I had to install ‘cffi’ explicitly but I was able to successfully install pynq onto the virtual env.

Regards,  
Pratap

---

<div class="post-metadata">

**Author:** ![marioruiz](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/marioruiz/32/2177_2.png) [@marioruiz](https://discuss.pynq.io/u/marioruiz)\
**Post date:** [July 4, 2022, 7:42am UTC](https://discuss.pynq.io/t/unable-to-build-wheel-for-pynq/4419/4 "2022-07-04T07:42:28Z")

</div>