diff --git a/appveyor.yml b/appveyor.yml
index 84a7d2f..c515ed3 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -19,7 +19,7 @@ cache:
  - c:\tools\vcpkg\installed\
  - c:\projects\drak-0\drak-0\obj\
 install:
- - cmd /c .\install.bat
+ - call .\install.bat
 after_build:
  - del /S "C:\projects\DRAK-0\%proj_platform%\%proj_configuration%\*.iobj"
  - del /S "C:\projects\DRAK-0\%proj_platform%\%proj_configuration%\*.ipdb"
diff --git a/install.bat b/install.bat
index 71c0e23..716e9e9 100644
--- a/install.bat
+++ b/install.bat
@@ -5,15 +5,15 @@ if "%proj_platform%"=="x86" ( goto BIT86 ) else ( if "%proj_platform%"=="x64" (
 
 :BIT86
 vcpkg install sfml:x86-windows
-%comspec% /k "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars32.bat"
+call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars32.bat"
 goto END
 
 :BIT64
 vcpkg install sfml:x64-windows
-%comspec% /k "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars64.bat"
+call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars64.bat"
 goto END
 
 :END
 cd "C:\projects\drak-0\deps\luajit-2.0\src"
-.\msvcbuild.bat
+call .\msvcbuild.bat
 cd "C:\projects\drak-0"