How can I make Inno Setup ignore empty directories?

My Inno Setup script includes a directory:

[Files]
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Source: C:\MyProg\Tools\*.*; Destdir: {app}\Tools
...

But sometimes this directory is empty and in that case Inno开发者_开发技巧 Setup stops with an error "No files matching ...".

My current workaround is adding an empty dummy file to that directory.

Can I make Inno Setup ignore this directory if it is empty?

Did you try the skipifsourcedoesntexist flag?

[Files]
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Source: C:\MyProg\Tools\*.*; Destdir: {app}\Tools; Flags: skipifsourcedoesntexist 
...