# How to use developed package in IJulia?

**URL:** <https://discourse.julialang.org/t/how-to-use-developed-package-in-ijulia/38676>\
**Category:** General Usage\
**Tags:** question\
**Created:** [May 3, 2020, 2:41pm UTC](https://discourse.julialang.org/t/how-to-use-developed-package-in-ijulia/38676 "2020-05-03T14:41:15Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![dcastel](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/dcastel/32/10692_2.png) [@dcastel](https://discourse.julialang.org/u/dcastel)\
**Post date:** [May 3, 2020, 2:41pm UTC](https://discourse.julialang.org/t/how-to-use-developed-package-in-ijulia/38676/1 "2020-05-03T14:41:15Z")

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Hi all,

I was creating a pull request for Plots.jl when I wanted to test a feature available in a Jupyter notebook. In various ways I tried including the locally developed package into the notebook but I did not succeed. That is I wasn’t able to use the newly exported webm function that worked fine in the regular Julia REPL.

```julia
using Pkg
Pkg.develop(PackageSpec(path="../../.julia/dev/Plots")) #doesn't work
# or
#Pkg.add(PackageSpec(path="../../.julia/dev/Plots",rev="webm")) #also doesn't work
using Plots
webm

```

Example output of that to be seen here:

> <https://github.com/dietercastel/LuxorT/blob/master/IJuliaDevPkg.ipynb>

So how would I go about it? Or what can I do to debug further?

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<div class="post-metadata">

**Author:** ![stevengj](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/stevengj/32/71_2.png) [@stevengj](https://discourse.julialang.org/u/stevengj)\
**Post date:** [May 3, 2020, 4:40pm UTC](https://discourse.julialang.org/t/how-to-use-developed-package-in-ijulia/38676/2 "2020-05-03T16:40:37Z")

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Just `] dev Plots` should work. What is the output?

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<div class="post-metadata">

**Author:** ![dcastel](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/dcastel/32/10692_2.png) [@dcastel](https://discourse.julialang.org/u/dcastel)\
**Post date:** [May 3, 2020, 5:20pm UTC](https://discourse.julialang.org/t/how-to-use-developed-package-in-ijulia/38676/3 "2020-05-03T17:20:29Z")

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Ah wow, that worked! Didn’t knew you could use the `]` syntax outside of the REPL. That works now!

Thanks!

Now it’s only a question for the very curious. Isn’t `] dev Plots` just a call `Pkg.develop` similar to the one above?