# Julia 1.3 and Metalhead

**URL:** https://discourse.julialang.org/t/julia-1-3-and-metalhead/32453
**Category:** New to Julia
**Tags:** machine-learning
**Created:** [December 18, 2019, 7:45pm UTC](https://discourse.julialang.org/t/julia-1-3-and-metalhead/32453 "2019-12-18T19:45:44Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![hhb](https://avatars.discourse-cdn.com/v4/letter/h/ba9def/32.png) [@hhb](https://discourse.julialang.org/u/hhb)
#### Post date: [December 18, 2019, 7:45pm UTC](https://discourse.julialang.org/t/julia-1-3-and-metalhead/32453/1 "2019-12-18T19:45:44Z")

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Hello,

just downloaded the fresh 1.3 binary from the website.  
First thing done was

```julia
   using Pkg
   Pkg.add("Flux")

```

So far so good.  
Then  
` Pkg.add("Metalhead")`

does NOT work, I get the stuff below.  
I did nuke the .julia folder before doing anything.  
What am I missing?  
Any help greatly welcome.

Heinz.

```julia
julia> Pkg.add("Metalhead")
 Resolving package versions...
ERROR: Unsatisfiable requirements detected for package FFTW [7a1cc6ca]:
 FFTW [7a1cc6ca] log:
 ├─possible versions are: [0.1.0-0.1.2, 0.2.0-0.2.4, 0.3.0, 1.0.0-1.0.1, 1.1.0, 1.2.0] or uninstalled
 ├─restricted by compatibility requirements with ImageFiltering [6a3955dd] to versions: [0.1.0-0.1.2, 0.2.0-0.2.4, 0.3.0]
 │ └─ImageFiltering [6a3955dd] log:
 │ ├─possible versions are: [0.4.0-0.4.1, 0.5.0-0.5.4, 0.6.0-0.6.7] or uninstalled
 │ └─restricted by compatibility requirements with Metalhead [dbeba491] to versions: [0.4.0-0.4.1, 0.5.0-0.5.4]
 │ └─Metalhead [dbeba491] log:
 │ ├─possible versions are: [0.3.0, 0.4.0] or uninstalled
 │ ├─restricted to versions * by an explicit requirement, leaving only versions [0.3.0, 0.4.0]
 │ └─restricted by compatibility requirements with Flux [587475ba] to versions: 0.3.0 or uninstalled, leaving only versions: 0.3.0
 │ └─Flux [587475ba] log:
 │ ├─possible versions are: [0.4.1, 0.5.0-0.5.4, 0.6.0-0.6.10, 0.7.0-0.7.3, 0.8.0-0.8.3, 0.9.0, 0.10.0] or uninstalled
 │ └─restricted to versions 0.10.0 by an explicit requirement, leaving only versions 0.10.0
 └─restricted by compatibility requirements with Zygote [e88e6eb3] to versions: [1.0.0-1.0.1, 1.1.0, 1.2.0] — no versions left
   └─Zygote [e88e6eb3] log:
     ├─possible versions are: [0.1.0, 0.2.0, 0.3.0-0.3.4, 0.4.0-0.4.1] or uninstalled
     └─restricted by compatibility requirements with Flux [587475ba] to versions: 0.4.0-0.4.1
       └─Flux [587475ba] log: see above

```

---

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### Author: ![Syx\_Pek](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/syx_pek/32/6364_2.png) [@Syx\_Pek](https://discourse.julialang.org/u/Syx_Pek)
#### Post date: [December 18, 2019, 8:19pm UTC](https://discourse.julialang.org/t/julia-1-3-and-metalhead/32453/2 "2019-12-18T20:19:25Z")

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Flux recently updated to v0.10 and not all the packages are compatible with it yet.  
You can downgrade Flux to v0.9 by `]pin Flux@0.9` and this would allow you to add `Metalhead.jl`.

---

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### Author: ![hhb](https://avatars.discourse-cdn.com/v4/letter/h/ba9def/32.png) [@hhb](https://discourse.julialang.org/u/hhb)
#### Post date: [December 19, 2019, 5:38pm UTC](https://discourse.julialang.org/t/julia-1-3-and-metalhead/32453/3 "2019-12-19T17:38:18Z")

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Awesome, @Syx_Pek, thank you!