# Cannot build CUDANative: CUDA toolkit at doesn't contain nvcc?

**URL:** <https://discourse.julialang.org/t/cannot-build-cudanative-cuda-toolkit-at-doesnt-contain-nvcc/17614>\
**Category:** General Usage\
**Created:** [November 16, 2018, 7:48pm UTC](https://discourse.julialang.org/t/cannot-build-cudanative-cuda-toolkit-at-doesnt-contain-nvcc/17614 "2018-11-16T19:48:51Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Seif\_Shebl](https://avatars.discourse-cdn.com/v4/letter/s/eada6e/32.png) [@Seif\_Shebl](https://discourse.julialang.org/u/Seif_Shebl)\
**Post date:** [November 16, 2018, 7:48pm UTC](https://discourse.julialang.org/t/cannot-build-cudanative-cuda-toolkit-at-doesnt-contain-nvcc/17614/1 "2018-11-16T19:48:51Z")

</div>

Using Julia 1.0.1 on Windows 10, I tried to install `CuArrays` but one of the dependencies, `CUDANative`, couldn’t be built properly, how can I solve this?

```julia
julia> Pkg.build("CUDAnative")
  Building LLVM ──────→ `C:\Users\Seif\.julia\packages\LLVM\mcS4Y\deps\build.log`
  Building CUDAdrv ───→ `C:\Users\Seif\.julia\packages\CUDAdrv\LC5XS\deps\build.log`
  Building CUDAnative → `C:\Users\Seif\.julia\packages\CUDAnative\AGfq2\deps\build.log`
┌ Error: Error building `CUDAnative`:
│ ERROR: LoadError: CUDA toolkit at doesn't contain nvcc
│ Stacktrace:
│ [1] error(::String) at .\error.jl:33
│ [2] find_toolkit_version(::Array{String,1}) at C:\Users\Seif\.julia\packages\CUDAapi\tF455\src\discovery.jl:268
│ [3] main() at C:\Users\Seif\.julia\packages\CUDAnative\AGfq2\deps\build.jl:114
│ [4] top-level scope at none:0
│ [5] include at .\boot.jl:317 [inlined]
│ [6] include_relative(::Module, ::String) at .\loading.jl:1041
│ [7] include(::Module, ::String) at .\sysimg.jl:29
│ [8] include(::String) at .\client.jl:388
│ [9] top-level scope at none:0
│ in expression starting at C:\Users\Seif\.julia\packages\CUDAnative\AGfq2\deps\build.jl:156
└ @ Pkg.Operations C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.0\Pkg\src\Operations.jl:1069

```

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<div class="post-metadata">

**Author:** ![dustyirwin](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/dustyirwin/32/14996_2.png) [@dustyirwin](https://discourse.julialang.org/u/dustyirwin)\
**Post date:** [December 5, 2018, 12:38am UTC](https://discourse.julialang.org/t/cannot-build-cudanative-cuda-toolkit-at-doesnt-contain-nvcc/17614/2 "2018-12-05T00:38:56Z")

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I ran into the same problem, and had to install the CUDA toolkit: [Accelerated Computing Tools | Developer](https://developer.nvidia.com/accelerated-computing-toolkit)  
and then it worked.