$INSTDIR change problem

If append a subdirectory name to $INSTDIR in the leave function of directory page, it will be lost.

Try the .onVerifyInstDir

It doesn't help. I got the same result.

Sorry, I didn't watch your 1st post carefully 🙂
I think the solution is into the manual, 4.8.1.21 InstallDir

I know this section.
It works only with the "Browse" button.

I need a workaround for the directly written path.

You don't want the user to know the appended installation dir?

Then add it into the installation section, e.g.
Setoupath "$INSTDIR\My_append"

This script represents the problem.

The $INSTDIR is repaired in the DirLeave function, but the messagebox in CustomPre function will show the unfixed value.