# How to build CDDLib.jl on Windows ✅
**URL:** https://discourse.julialang.org/t/how-to-build-cddlib-jl-on-windows/28114
**Category:** Optimization (Mathematical)
**Created:** [August 28, 2019, 3:07pm UTC](https://discourse.julialang.org/t/how-to-build-cddlib-jl-on-windows/28114 "2019-08-28T15:07:46Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@uwechsler](https://discourse.julialang.org/u/uwechsler)
#### Post date: [August 28, 2019, 3:07pm UTC](https://discourse.julialang.org/t/how-to-build-cddlib-jl-on-windows/28114/1 "2019-08-28T15:07:46Z")
For my current project, I’d like to run `CDDLib.jl` on a Windows system. Currently, I get the following error message when trying to build the library.
```julia
(v1.1) pkg> build CDDLib
Building SpecialFunctions → `C:\Users\wueli\.julia\packages\SpecialFunctions\fvheQ\deps\build.log`
Building Homebrew ────────→ `C:\Users\wueli\.julia\packages\Homebrew\s09IX\deps\build.log`
Building CDDLib ──────────→ `C:\Users\wueli\.julia\packages\CDDLib\Okc0M\deps\build.log`
┌ Error: Error building `CDDLib`:
│ ERROR: LoadError: LibraryProduct(nothing, ["libcddgmp"], :libcddgmp, "Prefix(C:\\Users\\wueli\\.julia\\packages\\CDDLib\\Okc0M\\deps\\usr)") is not satisfied, cannot generate deps.jl!
│ Stacktrace:
│ [1] error(::String) at .\error.jl:33
│ [2] #write_deps_file#156(::Bool, ::Function, ::String, ::Array{LibraryProduct,1}) at C:\Users\wueli\.julia\packages\BinaryProvider\TcAwt\src\Products.jl:414
│ [3] (::getfield(BinaryProvider, Symbol("#kw##write_deps_file")))(::NamedTuple{(:verbose,),Tuple{Bool}}, ::typeof(write_deps_file), ::String, ::Array{LibraryProduct,1}) at .\none:0
│ [4] top-level scope at none:0
│ [5] include at .\boot.jl:326 [inlined]
│ [6] include_relative(::Module, ::String) at .\loading.jl:1038
│ [7] include(::Module, ::String) at .\sysimg.jl:29
│ [8] include(::String) at .\client.jl:403
│ [9] top-level scope at none:0
│ in expression starting at C:\Users\wueli\.julia\packages\CDDLib\Okc0M\deps\build.jl:48
└ @ Pkg.Operations C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\Operations.jl:1075
```
See also this issue: [#46](https://github.com/JuliaPolyhedra/CDDLib.jl/issues/46). Since it is in my own interest, I am willing to put effort into making it work. But currently, I am a bit at loss with where to even start.
Do you have experience with similar issues? I am glad for any pointers.
---
### Author:  [@uwechsler](https://discourse.julialang.org/u/uwechsler)
#### Post date: [September 1, 2019, 2:48pm UTC](https://discourse.julialang.org/t/how-to-build-cddlib-jl-on-windows/28114/2 "2019-09-01T14:48:16Z")
The issue has been fixed.
I just wanted to thank @blegat, @staticfloat, **[benlorenz](https://github.com/benlorenz)**, @juan-pablo-vielma for their work and support with this issue. Once again, I am amazed by how great this community is. Thanks you all!