Running script from correct directory

appveyor.yml

@@ -111,8 +111,11 @@ after_build:
 - cmd: '%ROOT%/bin/%CONFIG_PARTIAL%-%OS_PARTIAL%-%PLAT_PARTIAL%/tests/tests.exe'
 # show content of test dir to see if report is created.
 - cmd: 'dir bin\%CONFIG_PARTIAL%-%OS_PARTIAL%-%PLAT_PARTIAL%\tests'
-# Create installer [it works because appveyor image comes with NSIS installed]
-- cmd: '%SCRIPTS%\create_installer.bat %CONFIG_PARTIAL% -s'
+- cmd: 'dir .'
+# Change directory, call installer script and step back one directory
+# Operators in CMD https://stackoverflow.com/questions/28889954/what-does-do-in-this-batch-file/28889980#28889980
+- cmd: "cd %SCRIPTS% & create_installer.bat %CONFIG_PARTIAL% -s"
+- cmd: 'dir .'
 # Renaming installer to include version in its name
 - cmd: 'ren %OUTPUT_FOLDER%\installers\%PRODUCT_NAME%Setup.exe "%PRODUCT_NAME%-%FILE_VERSION%-setup.exe"'
 

scripts/create_installer.bat

@@ -52,6 +52,7 @@ IF "%SILENT_MODE%" == "true" (
 
 @rem run following lines one folder above
 pushd %~dp0..\
+echo %~dp0
 @rem variables have to be defined before passing the installer path
 call "C:\Program Files (x86)\NSIS\makensis.exe" "/DCONFIG_PARAM=%CONFIG%" "installer\Ember.nsi"
 popd