Unescaped space causes build error in VS2013 Express, but where is it coming from?

Development Platform & Builds
, , ,
1

I was following through the official guide to getting a C++ project built, and when I followed the last step, I got an error during build:

1>Build started 5/3/2014 4:29:08 PM.
1>Build:
1>  'C:\Users\B@$H' is not recognized as an internal or external command,
1>  operable program or batch file.
1>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.MakeFile.Targets(38,5): error MSB3073: The command ""C:\Program Files\Unreal Engine\4.1\Engine\Build\BatchFiles\Build.bat" TahitiEditor Win64 Development "C:\Unreal Projects\Tahiti\Tahiti.uproject" -rocket" exited with code 1.
1>
1>Build FAILED.
1>
1>Time Elapsed 00:00:00.26

I’m using Visual Studio Express 2013. My windows username is two words, and you see above that it cut off after the first. Where do I look to fix this problem?

2

So, running the command in the commandline works just fine, but it does not work in Visual Studio Express. I’m guessing that there is something in the VS/Express build configuration that contains an un-escaped string pointing to my home directory.