build fails since deps/deps.jl is read-only

[jaakkor2]

]build ModernGL fails since deps/build.jl tries to overwrite a read-only file deps/deps.jl.

 Building ModernGL → `C:\Users\jaakkor2\.julia\packages\ModernGL\CJTB7\deps\build.log`
[ Info: No changes
┌ Error: Error building `ModernGL`:
│ ERROR: LoadError: SystemError: opening file "C:\\Users\\jruohio\\.julia\\packages\\ModernGL\\CJTB7\\deps\\deps.jl": Permission denied
│ Stacktrace:
│  [1] #systemerror#44(::Nothing, ::typeof(systemerror), ::String, ::Bool) at .\error.jl:134
│  [2] systemerror at .\error.jl:134 [inlined]
│  [3] #open#512(::Nothing, ::Nothing, ::Nothing, ::Bool, ::Nothing, ::typeof(open), ::String) at .\iostream.jl:254
│  [4] #open at .\none:0 [inlined]
│  [5] open(::String, ::String) at .\iostream.jl:310
│  [6] #open#271(::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::typeof(open), ::var"#3#4", ::String, ::Vararg{String,N} where N) at .\io.jl:296
│  [7] open(::Function, ::String, ::String) at .\io.jl:296
│  [8] top-level scope at C:\Users\jaakkor2\.julia\packages\ModernGL\CJTB7\deps\build.jl:2
│  [9] include at .\boot.jl:328 [inlined]
│  [10] include_relative(::Module, ::String) at .\loading.jl:1105
│  [11] include(::Module, ::String) at .\Base.jl:31
│  [12] include(::String) at .\client.jl:424
│  [13] top-level scope at none:5
│ in expression starting at C:\Users\jaakkor2\.julia\packages\ModernGL\CJTB7\deps\build.jl:2
└ @ Pkg.Operations D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.3\Pkg\src\backwards_compatible_isolation.jl:649