# Precompilation errors while adding self-developed package to another package

**URL:** <https://discourse.julialang.org/t/precompilation-errors-while-adding-self-developed-package-to-another-package/124028>\
**Category:** New to Julia\
**Tags:** question\
**Created:** [December 20, 2024, 2:23pm UTC](https://discourse.julialang.org/t/precompilation-errors-while-adding-self-developed-package-to-another-package/124028 "2024-12-20T14:23:41Z")\
**Posts on this page:** 1\
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**Author:** ![giordano](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/giordano/32/2166_2.png) [@giordano](https://discourse.julialang.org/u/giordano)\
**Post date:** [December 20, 2024, 6:13pm UTC](https://discourse.julialang.org/t/precompilation-errors-while-adding-self-developed-package-to-another-package/124028/3 "2024-12-20T18:13:12Z")

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> [@brianguenter](#):
>
> It’s almost impossible to help without specific details.

My educated guess: you’re using Julia v1.10 or older. And the package manager for some reason decided to favour an incredibly old version of `FFMPEG.jl` which required the super old package `BinaryProvider.jl` (when resolving an environment there are often several possible solutions and one has to be picked based on some heuristics, but these heuristics aren’t infallibile). One workaround is to add `FFMPEG@0.4` to your environment. Another option is to use Julia v1.11, which doesn’t allow installing `BinaryProvider` at all.

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