(v1.1) pkg> add IJulia
   Cloning default registries into `C:\Users\jakub\.julia`
   Cloning registry from "https://github.com/JuliaRegistries/General.git"
ERROR: SystemError: opening file "C:\\Users\\jakub\\.julia\\registries\\General\\Registry.toml": No such file or directory
Stacktrace:
 [1] #systemerror#43(::Nothing, ::Function, ::String, ::Bool) at .\error.jl:134
 [2] systemerror at .\error.jl:134 [inlined]
 [3] #open#309(::Bool, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Function, ::String) at .\iostream.jl:283
 [4] #open at .\none:0 [inlined]
 [5] open(::String, ::String) at .\iostream.jl:339
 [6] #open#310(::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::Function, ::typeof(Pkg.TOML.parse), ::String, ::Vararg{String,N} where N) at .\iostream.jl:367
 [7] open at .\iostream.jl:367 [inlined]
 [8] parsefile at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\ext\TOML\src\TOML.jl:46 [inlined]
 [9] #read_registry#91(::Bool, ::Function, ::String) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\Types.jl:1149
 [10] read_registry at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\Types.jl:1144 [inlined]
 [11] clone_or_cp_registries(::Pkg.Types.Context, ::Array{Pkg.Types.RegistrySpec,1}, ::String) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\Types.jl:1121
 [12] clone_or_cp_registries at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\Types.jl:1087 [inlined]
 [13] clone_default_registries() at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\Types.jl:1037
 [14] find_registered!(::Pkg.Types.EnvCache, ::Array{String,1}, ::Array{Base.UUID,1}) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\Types.jl:1312
 [15] registry_resolve!(::Pkg.Types.EnvCache, ::Array{Pkg.Types.PackageSpec,1}) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\Types.jl:949
 [16] #add_or_develop#15(::Symbol, ::Bool, ::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::Function, ::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\API.jl:47
 [17] (::getfield(Pkg.API, Symbol("#kw##add_or_develop")))(::NamedTuple{(:mode,),Tuple{Symbol}}, ::typeof(Pkg.API.add_or_develop), ::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at .\none:0
 [18] do_add!(::Dict{Symbol,Any}, ::Array{Pkg.Types.PackageSpec,1}, ::Dict{Symbol,Any}) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\REPLMode.jl:659
 [19] #invokelatest#1(::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::Function, ::Any, ::Any, ::Vararg{Any,N} where N) at .\essentials.jl:742
 [20] invokelatest(::Any, ::Any, ::Vararg{Any,N} where N) at .\essentials.jl:741
 [21] do_cmd!(::Pkg.REPLMode.PkgCommand, ::REPL.LineEditREPL) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\REPLMode.jl:561
 [22] #do_cmd#30(::Bool, ::Function, ::REPL.LineEditREPL, ::String) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\REPLMode.jl:536
 [23] do_cmd at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\REPLMode.jl:532 [inlined]
 [24] (::getfield(Pkg.REPLMode, Symbol("##48#51")){REPL.LineEditREPL,REPL.LineEdit.Prompt})(::REPL.LineEdit.MIState, ::Base.GenericIOBuffer{Array{UInt8,1}}, ::Bool) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\REPLMode.jl:967
 [25] #invokelatest#1 at .\essentials.jl:742 [inlined]
 [26] invokelatest at .\essentials.jl:741 [inlined]
 [27] run_interface(::REPL.Terminals.TextTerminal, ::REPL.LineEdit.ModalInterface, ::REPL.LineEdit.MIState) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\REPL\src\LineEdit.jl:2273
 [28] run_frontend(::REPL.LineEditREPL, ::REPL.REPLBackendRef) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\REPL\src\REPL.jl:1035
 [29] run_repl(::REPL.AbstractREPL, ::Any) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\REPL\src\REPL.jl:192
 [30] (::getfield(Base, Symbol("##734#736")){Bool,Bool,Bool,Bool})(::Module) at .\client.jl:362
 [31] #invokelatest#1 at .\essentials.jl:742 [inlined]
 [32] invokelatest at .\essentials.jl:741 [inlined]
 [33] run_main_repl(::Bool, ::Bool, ::Bool, ::Bool, ::Bool) at .\client.jl:346
 [34] exec_options(::Base.JLOptions) at .\client.jl:284
 [35] _start() at .\client.jl:436