Correct portable extraction

.appveyor.yml

@@ -23,13 +23,13 @@ install:
   - "python -c \"import struct; print(struct.calcsize('P') * 8)\""
 
   # Install miktex
-  - ps: "wget http://mirrors.ctan.org/systems/win32/miktex/setup/miktex-portable-2.9.5719.exe -OutFile ./basic-miktex.exe"
-  - "7z e basic-miktex.exe * -omiktex"
+  - ps: "wget http://mirrors.ctan.org/systems/win32/miktex/setup/miktex-portable-2.9.5719.exe -OutFile ./miktex-portable.exe"
+  - "7z x miktex-portable.exe * -aot"
   #- cmd: basic-miktex.exe --unattended --portable --user-config=%LOCALAPPDATA%\MiKTeX\2.9 --user-data=%LOCALAPPDATA%\MiKTeX\2.9 --user-install=%LOCALAPPDATA%\MiKTeX\2.9
 
   - cmd: dir .
-  - cmd: dir .\miktex
-  - cmd: dir .\miktex\bin
+  - cmd: dir .\miktex-portable
+  - cmd: dir .\miktex-portable\bin
 
   - cmd: doskey lualatex=%LOCALAPPDATA%\MiKTeX\2.9\miktex\bin\lualatex.exe $*