# BinaryBuilder.jl updating library version and downloading dependencies

**URL:** <https://discourse.julialang.org/t/binarybuilder-jl-updating-library-version-and-downloading-dependencies/12562>\
**Category:** General Usage\
**Created:** [July 21, 2018, 2:52pm UTC](https://discourse.julialang.org/t/binarybuilder-jl-updating-library-version-and-downloading-dependencies/12562 "2018-07-21T14:52:08Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![isuruf](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/isuruf/32/106_2.png) [@isuruf](https://discourse.julialang.org/u/isuruf)\
**Post date:** [July 21, 2018, 2:52pm UTC](https://discourse.julialang.org/t/binarybuilder-jl-updating-library-version-and-downloading-dependencies/12562/1 "2018-07-21T14:52:08Z")

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Hi,

I’m looking at switching from BinDeps.jl to BinaryProvider.jl and I have 2 questions and possible solutions, but I’m not sure whether they are the best solutions.

1. How do I download dependencies of the binary dependencies?  
I have a C++ library that my Julia package needs and the C++ library depends on 3 other libraries which already have BinaryProvider scripts. I need all 4 of them as they are linked dynamically. My solution is to download these 4 scripts and eval them.

2. If I want to upgrade the dependency libfoo in a new version of the Julia Package, it wouldn’t because the file libfoo.so is already there.  
My solution was to set `ARGS=[joinpath(@ __DIR__ , "libfoo-$version")` and eval the 4 scripts. This is not that great because I cannot update just a dependency.

Let me know if there are better solutions for the above problems

Isuru