Pkg.build("Cairo")
Building LibCURL -? C:\Users\xxxx\.julia\packages\LibCURL\lWJxD\deps\build.log

• Error: Error building LibCURL:
  ¦ ERROR: LoadError: LoadError: LibraryProduct(nothing, ["libz"], :libz, "Prefix(C:\Users\xxxx\.julia\packages\LibCURL\lWJxD\deps\usr)") is not satisfied, cannot generate deps.jl!
  ¦ Stacktrace:
  ¦ [1] error(::String) at .\error.jl:33
  ¦ [2] #write_deps_file#169(::Bool, ::Bool, ::Function, ::String, ::Array{LibraryProduct,1}) at C:\Users\xxxx.julia\packages\BinaryProvider\A0sDa\src\Products.jl:419
  ¦ [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 at .\sysimg.jl:29 [inlined]
  ¦ [8] include(::String) at C:\Users\xxxx.julia\packages\LibCURL\lWJxD\deps\build.jl:24
  ¦ [9] top-level scope at C:\Users\xxxx.julia\packages\LibCURL\lWJxD\deps\build.jl:25
  ¦ [10] include at .\boot.jl:326 [inlined]
  ¦ [11] include_relative(::Module, ::String) at .\loading.jl:1038
  ¦ [12] include(::Module, ::String) at .\sysimg.jl:29
  ¦ [13] include(::String) at .\client.jl:403
  ¦ [14] top-level scope at none:0
  ¦ in expression starting at C:\Users\xxxx.julia\packages\LibCURL\lWJxD\deps\build_Zlib.v1.2.11.jl:48
  ¦ in expression starting at C:\Users\xxxx.julia\packages\LibCURL\lWJxD\deps\build.jl:14
• @ Pkg.Operations C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\Operations.jl:1075