Build Error on Linux

[CarloLucibello]

On archlinux, with system arpack libraries available, I get the following error:

(v0.7) pkg> dev Arpack
   Cloning git-repo `https://github.com/JuliaLinearAlgebra/Arpack.jl.git`
  Updating git-repo `https://github.com/JuliaLinearAlgebra/Arpack.jl.git`
 Resolving package versions...
  Updating `~/.julia/environments/v0.7/Project.toml`
  [7d9fca2a] ? Arpack v0.1.1 [`~/.julia/dev/Arpack`]
  Updating `~/.julia/environments/v0.7/Manifest.toml`
  [7d9fca2a] ? Arpack v0.1.1 [`~/.julia/dev/Arpack`]
  Building Arpack → `~/.julia/dev/Arpack/deps/build.log`
┌ Error: Error building `Arpack`: 
│ [ Info: Downloading https://github.com/JuliaLinearAlgebra/ArpackBuilder/releases/download/v3.5.0-0.2.20/ArpackBuilder.x86_64-linux-gnu.tar.gz to /home/carlo/.julia/dev/Arpack/deps/usr/downloads/ArpackBuilder.x86_64-linux-gnu.tar.gz...
│ ┌ Warning: `wait(t::Task)` is deprecated, use `fetch(t)` instead.
│ │   caller = macro expansion at OutputCollector.jl:63 [inlined]
│ └ @ Core OutputCollector.jl:63
│ ┌ Warning: `wait(t::Task)` is deprecated, use `fetch(t)` instead.
│ │   caller = wait(::OutputCollector) at OutputCollector.jl:160
│ └ @ BinaryProvider OutputCollector.jl:160
│ ┌ Warning: `wait(t::Task)` is deprecated, use `fetch(t)` instead.
│ │   caller = wait(::OutputCollector) at OutputCollector.jl:161
│ └ @ BinaryProvider OutputCollector.jl:161
│ ┌ Warning: `wait(t::Task)` is deprecated, use `fetch(t)` instead.
│ │   caller = wait(::OutputCollector) at OutputCollector.jl:165
│ └ @ BinaryProvider OutputCollector.jl:165
│ ERROR: LoadError: LibraryProduct(nothing, ["libarpack"], :libarpack, "Prefix(/home/carlo/.julia/dev/Arpack/deps/usr)") is not satisfied, cannot generate deps.jl!
│ Stacktrace:
│  [1] error at ./error.jl:33 [inlined]
│  [2] #write_deps_file#134(::Bool, ::Function, ::String, ::Array{LibraryProduct,1}) at /home/carlo/.julia/packages/BinaryProvider/mWAR/src/Products.jl:392
│  [3] write_deps_file(::String, ::Array{LibraryProduct,1}) at /home/carlo/.julia/packages/BinaryProvider/mWAR/src/Products.jl:379
│  [4] top-level scope at none:0
│  [5] include at ./boot.jl:317 [inlined]
│  [6] include_relative(::Module, ::String) at ./loading.jl:1034
│  [7] include(::Module, ::String) at ./sysimg.jl:29
│  [8] include(::String) at ./client.jl:393
│  [9] top-level scope at none:0
│ in expression starting at /home/carlo/.julia/dev/Arpack/deps/build.jl:40
[13:22:58] ######################################################################## 100,0% 
└ @ Pkg.Operations Operations.jl:973

[andreasnoack]

Dup of #5