# Unable to build source from mangoh/mangoh repo

**URL:** <https://mangoh.discourse.group/t/unable-to-build-source-from-mangoh-mangoh-repo/3127>\
**Category:** mangOH Yellow\
**Created:** [December 6, 2019, 3:19am UTC](https://mangoh.discourse.group/t/unable-to-build-source-from-mangoh-mangoh-repo/3127 "2019-12-06T03:19:29Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jchitty](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jchitty/32/846_2.png) [@jchitty](https://mangoh.discourse.group/u/jchitty)\
**Post date:** [December 6, 2019, 3:55am UTC](https://mangoh.discourse.group/t/unable-to-build-source-from-mangoh-mangoh-repo/3127/2 "2019-12-06T03:55:42Z")

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Hi,

> [@johnemaddox](#):
>
> /mangOH/apps/Bme680EnvironmentalSensor/bsecIntegrationComponent/bsecIntegration.c:3:10: fatal error: bsec\_interface.h: No such file or directory  
> #include “bsec\_interface.h”  
> ^ ~~~~~~~~~~~~~~~~~

You need to set the BSEC\_DIR environment variable to the file system path where the Bosch Bsec library can be found. If you run `make yellow_wp77xx`, it should give you some more helpful error messages. But, basically, you download the zip file from the link below and unzip it in your components/boschBsec directory.

[https://community.bosch-sensortec.com/varuj77995/attachments/varuj77995/bst\_community-mems-forum/44/1/BSEC\_1.4.7.2\_GCC\_CortexA7\_20190225.zip](https://community.bosch-sensortec.com/varuj77995/attachments/varuj77995/bst_community-mems-forum/44/1/BSEC_1.4.7.2_GCC_CortexA7_20190225.zip)

Alternatively, if you don’t care about using the environmental sensor, you can comment-out the environment app and the related bindings in yellow.sdef.

–Jen

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