# When does a package activation/instantiation trigger a build?

**URL:** <https://discourse.julialang.org/t/when-does-a-package-activation-instantiation-trigger-a-build/43649>\
**Category:** General Usage\
**Tags:** package\
**Created:** [July 25, 2020, 12:52am UTC](https://discourse.julialang.org/t/when-does-a-package-activation-instantiation-trigger-a-build/43649 "2020-07-25T00:52:00Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![PetrKryslUCSD](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/petrkryslucsd/32/215825_2.png) [@PetrKryslUCSD](https://discourse.julialang.org/u/PetrKryslUCSD)\
**Post date:** [July 25, 2020, 3:07pm UTC](https://discourse.julialang.org/t/when-does-a-package-activation-instantiation-trigger-a-build/43649/3 "2020-07-25T15:07:46Z")

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That is correct information for a “local” install. But on [mybinder.org](http://mybinder.org) the mechanism appears to be different.  
I had to use a special script: [Mechanism for build() in mybinder? - #2 by PetrKryslUCSD](https://discourse.julialang.org/t/mechanism-for-build-in-mybinder/43644/2)

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