# Error in Pkg.build: " override this by setting \`ignore\_platform\` "

**URL:** https://discourse.julialang.org/t/error-in-pkg-build-override-this-by-setting-ignore-platform/59948
**Category:** General Usage
**Tags:** package, error
**Created:** [April 24, 2021, 7:53pm UTC](https://discourse.julialang.org/t/error-in-pkg-build-override-this-by-setting-ignore-platform/59948 "2021-04-24T19:53:31Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Hannah\_Rocio\_Santa\_C](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/hannah_rocio_santa_c/32/21913_2.png) [@Hannah\_Rocio\_Santa\_C](https://discourse.julialang.org/u/Hannah_Rocio_Santa_C)
#### Post date: [April 24, 2021, 7:53pm UTC](https://discourse.julialang.org/t/error-in-pkg-build-override-this-by-setting-ignore-platform/59948/1 "2021-04-24T19:53:31Z")

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Hello,

I’m hoping someone could help me with an error message I get when trying to build Arpack.  
I get the following message, which seems quite useful, but I don’t actually know how to follow the suggestion, so I was hoping someone could tell me how to do it.

Error building `Arpack`:  
│ ┌ Warning: Platform `x86_64-apple-darwin14-libgfortran5` is not an officially supported platform  
│ └ @ BinaryProvider /Users/vagrant/worker/juliapro-release-osx1011-0\_6/build/tmp\_julia/Julia-1.0.app/Contents/Resources/julia/share/julia/stdlib/v1.0/BinaryProvider/src/PlatformNames.jl:450  
│ ERROR: LoadError: ArgumentError: Will not install a tarball of platform unknown-unknown-unknown on a system of platform x86\_64-apple-darwin14-gcc8-cxx03 unless `ignore_platform` is explicitly set to `true`., override this by setting `ignore_platform`  
│ Stacktrace:  
│ [1] #install#143(::Prefix, ::String, ::Bool, ::Bool, ::Bool, ::Function, ::String, ::String) at /Users/vagrant/worker/juliapro-release-osx1011-0\_6/build/tmp\_julia/Julia-1.0.app/Contents/Resources/julia/share/julia/stdlib/v1.0/BinaryProvider/src/Prefix.jl:294  
│ [2] (::getfield(BinaryProvider, Symbol(“#kw##install”)))(::NamedTuple{(:prefix, :force, :verbose),Tuple{Prefix,Bool,Bool}}, ::typeof(install), ::String, ::String) at ./none:0  
│ [3] top-level scope at /Users/hannah/.juliapro/JuliaPro\_v1.0.5-2/packages/Arpack/zCmTA/deps/build.jl:70  
│ [4] include\_relative(::Module, ::String) at /Applications/JuliaPro-1.0.5-2.app/Contents/Resources/julia/Contents/Resources/julia/lib/julia/sys.dylib:?  
│ [5] include(::Module, ::String) at /Applications/JuliaPro-1.0.5-2.app/Contents/Resources/julia/Contents/Resources/julia/lib/julia/sys.dylib:?  
│ [6] include(::String) at ./client.jl:392  
│ [7] top-level scope at none:0  
│ in expression starting at /Users/hannah/.juliapro/JuliaPro\_v1.0.5-2/packages/Arpack/zCmTA/deps/build.jl:68

Thank you!

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<div class="post-metadata">

### Author: ![Hannah\_Rocio\_Santa\_C](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/hannah_rocio_santa_c/32/21913_2.png) [@Hannah\_Rocio\_Santa\_C](https://discourse.julialang.org/u/Hannah_Rocio_Santa_C)
#### Post date: [April 24, 2021, 8:26pm UTC](https://discourse.julialang.org/t/error-in-pkg-build-override-this-by-setting-ignore-platform/59948/2 "2021-04-24T20:26:46Z")

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I also posted my issue torn the Arpack GitHub: [https://github.com/JuliaLinearAlgebra/Arpack.jl/issues/128](https://github.com/JuliaLinearAlgebra/Arpack.jl/issues/128)