no method matching lower(::Base.Process, ::BinDeps.SynchronousStepCollection)

[isuruf]

┌ Error: ------------------------------------------------------------
│ # Build failed for SymEngine
│   exception =
│    LoadError: MethodError: no method matching lower(::Base.Process, ::BinDeps.SynchronousStepCollection)
│    Closest candidates are:
│      lower(::BinDeps.CCompile, ::Any) at /home/travis/.julia/v0.7/BinDeps/src/BinDeps.jl:254
│      lower(::BinDeps.ChangeDirectory, ::Any) at /home/travis/.julia/v0.7/BinDeps/src/BinDeps.jl:353
│      lower(::Nothing, ::Any) at /home/travis/.julia/v0.7/BinDeps/src/BinDeps.jl:358
│      ...
│    Stacktrace:
│     [1] lower(::Base.Process) at /home/travis/.julia/v0.7/BinDeps/src/BinDeps.jl:423
│     [2] satisfy!(::BinDeps.LibraryDependency, ::Array{DataType,1}) at /home/travis/.julia/v0.7/BinDeps/src/dependencies.jl:943
│     [3] satisfy!(::BinDeps.LibraryDependency) at /home/travis/.julia/v0.7/BinDeps/src/dependencies.jl:921
│     [4] top-level scope at /home/travis/.julia/v0.7/BinDeps/src/dependencies.jl:976
│     [5] include at ./boot.jl:314 [inlined]
│     [6] include_relative(::Module, ::String) at ./loading.jl:1067
│     [7] include at ./sysimg.jl:29 [inlined]
│     [8] include(::String) at ./loading.jl:1101
│     [9] top-level scope
│     [10] eval at ./boot.jl:317 [inlined]
│     [11] eval at ./sysimg.jl:74 [inlined]
│     [12] evalfile(::String, ::Array{String,1}) at ./loading.jl:1096 (repeats 2 times)
│     [13] #6 at ./none:13 [inlined]
│     [14] cd(::getfield(Main, Symbol("##6#8")){String}, ::String) at ./file.jl:72
│     [15] (::getfield(Main, Symbol("##5#7")))(::IOStream) at ./none:12
│     [16] #open#322(::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::Function, ::getfield(Main, Symbol("##5#7")), ::String, ::Vararg{String,N} where N) at ./iostream.jl:369
│     [17] open(::Function, ::String, ::String) at ./iostream.jl:367
│     [18] top-level scope
│     [19] eval at ./boot.jl:317 [inlined]
│     [20] eval(::Module, ::Expr) at ./sysimg.jl:74
│     [21] exec_options(::Base.JLOptions) at ./client.jl:304
│     [22] _start() at ./client.jl:455
│    in expression starting at /home/travis/.julia/v0.7/SymEngine/deps/build.jl:976
└ @ Main none:16

Setting lower(s::Base.Process, c::BinDeps.SynchronousStepCollection) = nothing fixes the error