# Unsatisfiable requirements detected. And now?

**URL:** <https://discourse.julialang.org/t/unsatisfiable-requirements-detected-and-now/16462>\
**Category:** New to Julia\
**Created:** [October 17, 2018, 7:38pm UTC](https://discourse.julialang.org/t/unsatisfiable-requirements-detected-and-now/16462 "2018-10-17T19:38:53Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![leiteiro](https://avatars.discourse-cdn.com/v4/letter/l/b5e925/32.png) [@leiteiro](https://discourse.julialang.org/u/leiteiro)\
**Post date:** [October 17, 2018, 7:38pm UTC](https://discourse.julialang.org/t/unsatisfiable-requirements-detected-and-now/16462/1 "2018-10-17T19:38:53Z")

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I want to install Nemo. What I did:

```
(JuliaPro_v1.0.1.1) pkg> add https://github.com/Nemocas/Nemo.jl
  Updating git-repo `https://github.com/Nemocas/Nemo.jl`
[ Info: Assigning UUID c7f49eef-4a2b-5356-a7f4-6c8886feae06 to Nemo
 Resolving package versions...
ERROR: Unsatisfiable requirements detected for package AbstractAlgebra [47ef31e3]:
 AbstractAlgebra [47ef31e3] log:
 ├─AbstractAlgebra [47ef31e3] has no known versions!
 └─restricted to versions 0.1.3-* by Nemo [c7f49eef] — no versions left
   └─Nemo [c7f49eef] log:
     ├─possible versions are: 0.0.0 or uninstalled
     └─Nemo [c7f49eef] is fixed to version 0.0.0

```

And now? What can I do?

─AbstractAlgebra [47ef31e3] has no known versions!  
“… is pretty clear, no?”

Not at all!

“You are trying to install Package XYZ I can find no version  
of this package which is compatible with the version of Julia  
which you are using.”

OK, so I looked at: [Travis CI - Test and Deploy Your Code with Confidence](https://travis-ci.org/Nemocas/Nemo.jl)  
and I see that it does work with Julia 1. And the same  
is true for AbstractAlgebra.

Being clueless …

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<div class="post-metadata">

**Author:** ![adamslc](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/adamslc/32/3452_2.png) [@adamslc](https://discourse.julialang.org/u/adamslc)\
**Post date:** [October 17, 2018, 7:43pm UTC](https://discourse.julialang.org/t/unsatisfiable-requirements-detected-and-now/16462/2 "2018-10-17T19:43:22Z")

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This is a JuliaPro issue:

> [@PhysicalConstants package with Julia 1.0.1.1?](https://discourse.julialang.org/t/physicalconstants-package-with-julia-1-0-1-1/16189/5):
>
> Yes, JuliaRun uses a smaller registry of supported packages. We do need to a) document this better b) document the list of packages c) document a way to switching to the General registry. All of this is forthcoming. Apologies for the trouble, but we wanted to get the bits out while we round out the documentation around it. Regards Avik

Your best bet for now is to either manually clone the [General Registry](https://github.com/JuliaRegistries/General) into your `.julia/registries` folder, or download Julia from [julialang.org](http://julialang.org).

---

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**Author:** ![leiteiro](https://avatars.discourse-cdn.com/v4/letter/l/b5e925/32.png) [@leiteiro](https://discourse.julialang.org/u/leiteiro)\
**Post date:** [October 18, 2018, 8:53pm UTC](https://discourse.julialang.org/t/unsatisfiable-requirements-detected-and-now/16462/3 "2018-10-18T20:53:25Z")

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> [@](#):
>
> Your best bet for now is to either manually clone the [General Registry](https://github.com/JuliaRegistries/General) into your `.julia/registries` folder …

Thanks, this worked!