julia> Pkg.build("IJulia")
INFO: Building Conda
INFO: Building MbedTLS
Using system libraries...
INFO: Building WinRPM
INFO: Downloading https://cache.julialang.org/http://download.opensuse.org/repositories/windows:/mingw:/win32/openSUSE_Leap_42.2/repodata/repomd.xml
INFO: Downloading https://cache.julialang.org/http://download.opensuse.org/repositories/windows:/mingw:/win64/openSUSE_Leap_42.2/repodata/repomd.xml
INFO: Building ZMQ
INFO: Updating WinRPM package list
INFO: Downloading https://cache.julialang.org/http://download.opensuse.org/repositories/windows:/mingw:/win32/openSUSE_Leap_42.2/repodata/repomd.xml
INFO: Downloading https://cache.julialang.org/http://download.opensuse.org/repositories/windows:/mingw:/win64/openSUSE_Leap_42.2/repodata/repomd.xml
INFO: Building IJulia
INFO: Found Jupyter version 4.3.0: C:\Users\user\AppData\Local\JuliaPro-0.6.2.2\Python\Scripts\jupyter.exe
INFO: Installing Julia kernelspec julia-0.6
Error executing Jupyter command 'kernelspec': [Errno 'jupyter-kernelspec' not found] 2
[InstallKernelSpec] Removing existing kernelspec in C:\Users\user\AppData\Roaming\jupyter\kernels\julia-0.6
[InstallKernelSpec] Installed kernelspec julia-0.6 in C:\Users\user\AppData\Roaming\jupyter\kernels\julia-0.6