Every once in a while I get this error:

Error: Error writing file '..\..\..\..\..\..\..\Users\Administrator\AppData\Roaming\dub\packages\derelict-assimp3-master\.dub\build\library-debug-windows-x86-dmd-7F811CB10FFAE5D52D1E21B73C0EC98D\DerelictASSIMP3.lib'

It seems to be completely random. It works 99% of the time, and then fails. My disk has plenty of free space. Could it be some kind of locking issue?

Here's the stack trace:

Full exception: object.Exception@source\dub\compilers\dmd.d(173): DMD compile run failed with exit code 1
----------------
0x004B3926 in pure @safe void std.exception.bailOut(immutable(char)[], uint, const(char[]))
0x0042CE34 in void dub.compilers.dmd.DmdCompiler.invoke(const(dub.compilers.compiler.BuildSettings), const(dub.compilers.compiler.BuildPlatform)) at C:\Users\build\AppData\Roaming\dub-ci-workspace\current\dub\source\dub\compilers\dmd.d(173)
0x00435192 in void dub.generators.build.BuildGenerator.buildWithCompiler(dub.generators.generator.GeneratorSettings, dub.compilers.compiler.BuildSettings) at C:\Users\build\AppData\Roaming\dub-ci-workspace\current\dub\source\dub\generators\build.d(351)
0x00433D4D in void dub.generators.build.BuildGenerator.performCachedBuild(dub.generators.generator.GeneratorSettings, dub.compilers.compiler.BuildSettings, const(dub.package_.Package), immutable(char)[], immutable(char)[]) at C:\Users\build\AppData\Roaming\dub-ci-workspace\current\dub\source\dub\generators\build.d(139)
0x004339D1 in void dub.generators.build.BuildGenerator.buildTarget(dub.generators.generator.GeneratorSettings, dub.compilers.compiler.BuildSettings, const(dub.package_.Package), immutable(char)[]) at C:\Users\build\AppData\Roaming\dub-ci-workspace\current\dub\source\dub\generators\build.d(97)
0x004337C8 in void dub.generators.build.BuildGenerator.generateTargets(dub.generators.generator.GeneratorSettings, const(dub.generators.generator.ProjectGenerator.TargetInfo[immutable(char)[]])).void buildTargetRec(immutable(char)[]) at C:\Users\build\AppData\Roaming\dub-ci-workspace\current\dub\source\dub\generators\build.d(65)