diff --git a/constructor/nsis/main.nsi.tmpl b/constructor/nsis/main.nsi.tmpl
index 29dfe1036..125901856 100644
--- a/constructor/nsis/main.nsi.tmpl
+++ b/constructor/nsis/main.nsi.tmpl
@@ -1251,9 +1251,9 @@ Section "Install"
     System::Call 'kernel32::SetEnvironmentVariable(t,t)i("INSTALLER_PLAT", "${PLATFORM}").r0'
     System::Call 'kernel32::SetEnvironmentVariable(t,t)i("INSTALLER_TYPE", "EXE").r0'
     ${If} ${Silent}
-    System::Call 'kernel32::SetEnvironmentVariable(t,t)i("INSTALLER_UNATTENDED", "1").r0'
+        System::Call 'kernel32::SetEnvironmentVariable(t,t)i("INSTALLER_UNATTENDED", "1").r0'
     ${Else}
-    System::Call 'kernel32::SetEnvironmentVariable(t,t)i("INSTALLER_UNATTENDED", "0").r0'
+        System::Call 'kernel32::SetEnvironmentVariable(t,t)i("INSTALLER_UNATTENDED", "0").r0'
     ${EndIf}
 
     ${If} '@VIRTUAL_SPECS@' != ''
@@ -1458,9 +1458,9 @@ Section "Uninstall"
     System::Call 'kernel32::SetEnvironmentVariable(t,t)i("INSTALLER_PLAT", "${PLATFORM}").r0'
     System::Call 'kernel32::SetEnvironmentVariable(t,t)i("INSTALLER_TYPE", "EXE").r0'
     ${If} ${Silent}
-    System::Call 'kernel32::SetEnvironmentVariable(t,t)i("INSTALLER_UNATTENDED", "1").r0'
+        System::Call 'kernel32::SetEnvironmentVariable(t,t)i("INSTALLER_UNATTENDED", "1").r0'
     ${Else}
-    System::Call 'kernel32::SetEnvironmentVariable(t,t)i("INSTALLER_UNATTENDED", "0").r0'
+        System::Call 'kernel32::SetEnvironmentVariable(t,t)i("INSTALLER_UNATTENDED", "0").r0'
     ${EndIf}
 
     !insertmacro AbortRetryNSExecWaitLibNsisCmd "pre_uninstall"
diff --git a/examples/scripts/post_install.bat b/examples/scripts/post_install.bat
index a3b406011..7916add93 100644
--- a/examples/scripts/post_install.bat
+++ b/examples/scripts/post_install.bat
@@ -3,7 +3,7 @@ if not "%INSTALLER_NAME%" == "Scripts" exit 1
 if not "%INSTALLER_VER%" == "X" exit 1
 if not "%INSTALLER_PLAT%" == "win-64" exit 1
 if not "%INSTALLER_TYPE%" == "EXE" exit 1
-if "%INSTALLER_UNATTENDED%" == "" exit 1
+if not "%INSTALLER_UNATTENDED%" == "1" exit 1
 if "%PREFIX%" == "" exit 1
 if not "%CUSTOM_VARIABLE_1%" == "FIR$T-CUSTOM_STRING WITH SPACES AND @*! CHARACTERS" exit 1
 if not "%CUSTOM_VARIABLE_2%" == "$ECOND-CUSTOM_STRING WITH SPACES AND @*! CHARACTERS" exit 1