# Problem building Proj4 package (LoadError: ArgumentError: Will not install a tarball of platform...)

**URL:** <https://discourse.julialang.org/t/problem-building-proj4-package-loaderror-argumenterror-will-not-install-a-tarball-of-platform/67504>\
**Category:** General Usage\
**Tags:** package, build\
**Created:** [September 1, 2021, 2:07pm UTC](https://discourse.julialang.org/t/problem-building-proj4-package-loaderror-argumenterror-will-not-install-a-tarball-of-platform/67504 "2021-09-01T14:07:47Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![yodefiar](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/yodefiar/32/28781_2.png) [@yodefiar](https://discourse.julialang.org/u/yodefiar)\
**Post date:** [September 1, 2021, 2:07pm UTC](https://discourse.julialang.org/t/problem-building-proj4-package-loaderror-argumenterror-will-not-install-a-tarball-of-platform/67504/1 "2021-09-01T14:07:47Z")

</div>

Hi I’m having problem building Proj4 package, it kept returning the error below

```julia
(@v1.6) pkg> build Proj4

    Building Proj4 → `C:\Users\Yodefia Rahmad\.julia\scratchspaces\44cfe95a-1eb2-52ea-b672-e2afdf69b78f\6a52f9d893b6ad6f15760990ea8adbabd7b64aa7\build.log`
ERROR: Error building `Proj4`:
ERROR: LoadError: ArgumentError: Will not install a tarball of platform x86_64-w64-mingw32-gcc7 on a system of platform x86_64-w64-mingw32-gcc8-cxx11 unless `ignore_platform` is explicitly set to `true`., override this by setting `ignore_platform`
Stacktrace:
 [1] install(tarball_url::String, hash::String; prefix::Prefix, tarball_path::String, force::Bool, ignore_platform::Bool, verbose::Bool)
   @ BinaryProvider C:\Users\Yodefia Rahmad\.julia\packages\BinaryProvider\U2dKK\src\Prefix.jl:294
 [2] top-level scope
   @ C:\Users\Yodefia Rahmad\.julia\packages\Proj4\RgJ8T\deps\build.jl:83
 [3] include(fname::String)
   @ Base.MainInclude .\client.jl:444
 [4] top-level scope
   @ none:5
in expression starting at C:\Users\Yodefia Rahmad\.julia\packages\Proj4\RgJ8T\deps\build.jl:81

```

I’m working with Julia 1.6.2 on Windows 10

Can anyone help me with this? Thanks!